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/jerry.cpp

@@ -1185,6 +1185,18 @@ jerry_get_memory_limits (size_t *out_data_bss_brk_limit_p, /**< out: Jerry's max
   *out_stack_limit_p = CONFIG_MEM_STACK_LIMIT;
 } /* jerry_get_memory_limits */
 
+/**
+ * Check whether 'abort' should be called instead of 'exit' upon exiting with non-zero exit code.
+ *
+ * @return true - if 'abort on fail' flag is set,
+ *         false - otherwise.
+ */
+bool
+jerry_is_abort_on_fail (void)
+{
+  return ((jerry_flags & JERRY_FLAG_ABORT_ON_FAIL) != 0);
+} /* jerry_is_abort_on_fail */
+
 /**
  * Register Jerry's fatal error callback
  */