AP_HAL_Empty: standardize inclusion of libaries headers

This commit changes the way libraries headers are included in source files:

 - If the header is in the same directory the source belongs to, so the
 notation '#include ""' is used with the path relative to the directory
 containing the source.

 - If the header is outside the directory containing the source, then we use
 the notation '#include <>' with the path relative to libraries folder.

Some of the advantages of such approach:

 - Only one search path for libraries headers.

 - OSs like Windows may have a better lookup time.

libraries/AP_HAL_Empty/AP_HAL_Empty.h

@@ -3,7 +3,7 @@
 #define __AP_HAL_EMPTY_H__
 
 /* Your layer exports should depend on AP_HAL.h ONLY. */
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 
 /**
  * Umbrella header for AP_HAL_Empty module.

libraries/AP_HAL_Empty/AnalogIn.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_ANALOGIN_H__
 #define __AP_HAL_EMPTY_ANALOGIN_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyAnalogSource : public AP_HAL::AnalogSource {
 public:

libraries/AP_HAL_Empty/GPIO.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_GPIO_H__
 #define __AP_HAL_EMPTY_GPIO_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyGPIO : public AP_HAL::GPIO {
 public:

libraries/AP_HAL_Empty/HAL_Empty_Class.cpp

@@ -1,5 +1,5 @@
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #if CONFIG_HAL_BOARD == HAL_BOARD_EMPTY
 
 #include "HAL_Empty_Class.h"

libraries/AP_HAL_Empty/HAL_Empty_Class.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_CLASS_H__
 #define __AP_HAL_EMPTY_CLASS_H__
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 
 #include "AP_HAL_Empty_Namespace.h"
 #include "PrivateMember.h"

libraries/AP_HAL_Empty/I2CDriver.cpp

@@ -1,5 +1,5 @@
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "I2CDriver.h"
 
 using namespace Empty;

libraries/AP_HAL_Empty/I2CDriver.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_I2CDRIVER_H__
 #define __AP_HAL_EMPTY_I2CDRIVER_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyI2CDriver : public AP_HAL::I2CDriver {
 public:

libraries/AP_HAL_Empty/RCInput.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_RCINPUT_H__
 #define __AP_HAL_EMPTY_RCINPUT_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyRCInput : public AP_HAL::RCInput {
 public:

libraries/AP_HAL_Empty/RCOutput.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_RCOUTPUT_H__
 #define __AP_HAL_EMPTY_RCOUTPUT_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyRCOutput : public AP_HAL::RCOutput {
     void     init(void* machtnichts);

libraries/AP_HAL_Empty/SPIDriver.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_SPIDRIVER_H__
 #define __AP_HAL_EMPTY_SPIDRIVER_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 #include "Semaphores.h"
 
 class Empty::EmptySPIDeviceDriver : public AP_HAL::SPIDeviceDriver {

libraries/AP_HAL_Empty/Scheduler.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_SCHEDULER_H__
 #define __AP_HAL_EMPTY_SCHEDULER_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyScheduler : public AP_HAL::Scheduler {
 public:

libraries/AP_HAL_Empty/Semaphores.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_SEMAPHORE_H__
 #define __AP_HAL_EMPTY_SEMAPHORE_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptySemaphore : public AP_HAL::Semaphore {
 public:

libraries/AP_HAL_Empty/Storage.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_STORAGE_H__
 #define __AP_HAL_EMPTY_STORAGE_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyStorage : public AP_HAL::Storage {
 public:

libraries/AP_HAL_Empty/UARTDriver.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_UARTDRIVER_H__
 #define __AP_HAL_EMPTY_UARTDRIVER_H__
 
-#include <AP_HAL_Empty.h>
+#include "AP_HAL_Empty.h"
 
 class Empty::EmptyUARTDriver : public AP_HAL::UARTDriver {
 public:

libraries/AP_HAL_Empty/Util.h

@@ -2,7 +2,7 @@
 #ifndef __AP_HAL_EMPTY_UTIL_H__
 #define __AP_HAL_EMPTY_UTIL_H__
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "AP_HAL_Empty_Namespace.h"
 
 class Empty::EmptyUtil : public AP_HAL::Util {

libraries/AP_HAL_Empty/examples/empty_example/empty_example.cpp

@@ -1,14 +1,14 @@
 
-#include <AP_HAL.h>
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>
 
-#include <AP_HAL_AVR.h>
-#include <AP_HAL_SITL.h>
-#include <AP_HAL_Empty.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_HAL_SITL/AP_HAL_SITL.h>
+#include <AP_HAL_Empty/AP_HAL_Empty.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;