Import changes made to files shared with the FSF GCC project.

Import changes made to files shared with the FSF GCC project.

	Import the following changes from the GCC mainline:

	2015-11-13  Tsvetkova Alexandra  <[email protected]>

	* configure.ac: Enable libmpx by default.
	* configure: Regenerated.

	2015-11-19  Martin Liska  <[email protected]>

	* .gitignore: Add .clang-format to ignored files.
	* Makefile.tpl: Add clang-format.
	* Makefile.in: Regenerate.

	2015-12-01  Andreas Tobler  <[email protected]>

	PR libffi/65726
	* Makefile.def (lang_env_dependencies): Make libffi depend
	on cxx.
	* Makefile.in: Regenerate.

	2015-12-02  Ian Lance Taylor  <[email protected]>

	PR go/66147
	* Makefile.tpl (HOST_EXPORTS): Add XGCC_FLAGS_FOR_TARGET.
	* Makefile.in: Regenerate.

	2015-12-17  Nathan Sidwell  <[email protected]>

	* config/isl.m4 (ISL_CHECK_VERSION): Add gmp libs.
	* configure: Regenerate.

	2015-12-17  Sebastian Pop  <[email protected]>

	* Makefile.in: Replace ISL with isl.
	* Makefile.tpl: Same.
	* config/isl.m4: Same.
	* configure.ac: Same.
	* contrib/download_prerequisites: Same.
	* configure: Regenerate.

	2016-01-01  Ben Elliston  <[email protected]>

	* config.guess: Import version 2016-01-01.
	* config.sub: Likewise.

include	2016-01-07  Mike Frysinger  <[email protected]>

	* longlong.h: Change !__SHMEDIA__ to
	(!defined (__SHMEDIA__) || !__SHMEDIA__).
	Change __SHMEDIA__ to defined (__SHMEDIA__) && __SHMEDIA__.