Respect EXECUTABLE_OUTPUT_PATH for bin/hex targets

gcc_stm32.cmake

@@ -60,8 +60,13 @@ SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
 SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 
 FUNCTION(STM32_ADD_HEX_BIN_TARGETS TARGET)
-    ADD_CUSTOM_TARGET(${TARGET}.hex DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Oihex ${TARGET} ${TARGET}.hex)
-    ADD_CUSTOM_TARGET(${TARGET}.bin DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Obinary ${TARGET} ${TARGET}.bin)
+    IF(EXECUTABLE_OUTPUT_PATH)
+      SET(FILENAME "${EXECUTABLE_OUTPUT_PATH}/${TARGET}")
+    ELSE()
+      SET(FILENAME "${TARGET}")
+    ENDIF()
+    ADD_CUSTOM_TARGET(${TARGET}.hex DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Oihex ${FILENAME} ${FILENAME}.hex)
+    ADD_CUSTOM_TARGET(${TARGET}.bin DEPENDS ${TARGET} COMMAND ${CMAKE_OBJCOPY} -Obinary ${FILENAME} ${FILENAME}.bin)
 ENDFUNCTION()
 
 STRING(TOLOWER ${STM32_FAMILY} STM32_FAMILY_LOWER)