AP_HAL: Added subtype board URUS.

This is a linux system based with Raspberry Pi B+, it's a automated
domotic system using APM framework.

libraries/AP_HAL/AP_HAL_Boards.h

@@ -35,6 +35,7 @@
 #define HAL_BOARD_SUBTYPE_LINUX_DISCO      1014
 #define HAL_BOARD_SUBTYPE_LINUX_AERO       1015
 #define HAL_BOARD_SUBTYPE_LINUX_DARK       1016
+#define HAL_BOARD_SUBTYPE_LINUX_URUS       1017
 
 /* HAL PX4 sub-types, starting at 2000 */
 #define HAL_BOARD_SUBTYPE_PX4_V1           2000

libraries/AP_HAL/board/linux.h

@@ -299,6 +299,13 @@
 #define HAL_GPIO_C_LED_PIN        16
 #define HAL_GPIO_LED_ON           LOW
 #define HAL_GPIO_LED_OFF          HIGH
+#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_URUS
+#define HAL_BOARD_LOG_DIRECTORY "/var/APM/logs"
+#define HAL_BOARD_TERRAIN_DIRECTORY "/var/APM/terrain"
+// Stub the sensors out for now, at least we can build and run
+#define HAL_INS_DEFAULT HAL_INS_HIL
+#define HAL_BARO_DEFAULT HAL_BARO_HIL
+#define HAL_COMPASS_DEFAULT HAL_COMPASS_HIL
 #else
 #error "no Linux board subtype set"
 #endif