Sync config files with GCC

Sync config files with GCC

	Sync with GCC
	2015-05-13  Eric Botcazou  <ebotcazou@adacore.com>

	* sjlj.m4: New file.

	2015-05-04  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* bitfields.m4: Change int to long long, and use bitfields of
	width 1 instead of 0.

	2015-05-01  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* bitfields.m4: New file.

	2015-04-14  H.J. Lu  <hongjiu.lu@intel.com>

	* bootstrap-mpx.mk: New file.

	2015-03-25  Uros Bizjak  <ubizjak@gmail.com>

	PR bootstrap/65537
	* bootstrap-lto-noplugin.mk: New build configuration.

	2014-11-13  Kirill Yukhin  <kirill.yukhin@intel.com>

	* target-posix: New file.

	2014-10-27  Tom Tromey  <tromey@redhat.com>

	* gcc-plugin.m4: New file.