PR 53379 Print backtrace on error termination.

PR 53379 Print backtrace on error termination.

2015-09-05  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/53379
	* libgfortran.h (exit_error): New prototype.
	* runtime/error.c (exit_error): New function.
	(os_error): Call exit_error instead of exit.
	(runtime_error): Likewise.
	(runtime_error_at): Likewise.
	(internal_error): Likewise.
	(generate_error): Likewise.
	(notify_std): Likewise.
	* runtime/stop.c (error_stop_string): Likewise.
	(error_stop_numeric): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227503 138bc75d-0d04-0410-961f-82ee72b054a4