Make exit behaviour of jerry_fatal flag-dependent

* Added new flag `JERRY_FLAG_ABORT_ON_FAIL`.
* Added new internal api function `jerry_is_abort_on_fail` to
  check the status of the flag.
* Changed `jerry_fatal` bail-out function to call `abort` when the
  flag is set and exit code is non-zero (i.e., not only for
  assertion failures).
* Added `--abort-on-fail` command line option to linux and nuttx
  apps to set the flag.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-core/jrt/jrt-fatals.cpp

@@ -20,6 +20,9 @@
 #include "jrt.h"
 #include "jrt-libc-includes.h"
 
+#define JERRY_INTERNAL
+#include "jerry-internal.h"
+
 /*
  * Exit with specified status code.
  *
@@ -62,7 +65,7 @@ jerry_fatal (jerry_fatal_code_t code) /**< status code */
   }
 #endif /* !JERRY_NDEBUG */
 
-  if (code == ERR_FAILED_INTERNAL_ASSERTION)
+  if (code != 0 && jerry_is_abort_on_fail ())
   {
     abort ();
   }