Fixes dependency not being cleaned by keeping the uavcan artifacts in the BUILD_DIR

src/modules/uavcan/module.mk

@@ -58,7 +58,8 @@ SRCS += sensors/sensor_bridge.cpp   \
 # libuavcan
 #
 include $(PX4_LIB_DIR)uavcan/libuavcan/include.mk
-SRCS += $(LIBUAVCAN_SRC)
+# Use the relitive path to keep the genrated files in the BUILD_DIR
+SRCS += $(subst  $(PX4_MODULE_SRC),../../,$(LIBUAVCAN_SRC))
 INCLUDE_DIRS += $(LIBUAVCAN_INC)
 # Since actual compiler mode is C++11, the library will default to UAVCAN_CPP11, but it will fail to compile
 # because this platform lacks most of the standard library and STL. Hence we need to force C++03 mode.
@@ -68,7 +69,8 @@ override EXTRADEFINES := $(EXTRADEFINES) -DUAVCAN_CPP_VERSION=UAVCAN_CPP03 -DUAV
 # libuavcan drivers for STM32
 #
 include $(PX4_LIB_DIR)uavcan/libuavcan_drivers/stm32/driver/include.mk
-SRCS += $(LIBUAVCAN_STM32_SRC)
+# Use the relitive path to keep the genrated files in the BUILD_DIR
+SRCS += $(subst  $(PX4_MODULE_SRC),../../,$(LIBUAVCAN_STM32_SRC))
 INCLUDE_DIRS += $(LIBUAVCAN_STM32_INC)
 override EXTRADEFINES := $(EXTRADEFINES) -DUAVCAN_STM32_NUTTX -DUAVCAN_STM32_NUM_IFACES=2