score: Add RTEMS_FATAL_SOURCE_APPLICATION

cpukit/score/include/rtems/score/interr.h

@@ -52,6 +52,13 @@ typedef enum {
    */
   RTEMS_FATAL_SOURCE_BDBUF,
 
+  /**
+   * @brief Fatal source for application specific errors.
+   *
+   * The fatal code is application specific.
+   */
+  RTEMS_FATAL_SOURCE_APPLICATION,
+
   /**
    * @brief The last available fatal source.
    *