Allow user to use his own FreeRTOSConfig.h

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

src/FreeRTOS/Source/include/FreeRTOS.h

@@ -95,7 +95,11 @@ extern "C" {
 #endif
 
 /* Application specific configuration options. */
+#if __has_include("FreeRTOSConfig.h")
 #include "FreeRTOSConfig.h"
+#else
+#include "FreeRTOSConfig_Default.h"
+#endif
 
 /* Basic FreeRTOS definitions. */
 #include "projdefs.h"