Makefile.am (AM_CXXFLAGS): Use -std=gnu++11.

Makefile.am (AM_CXXFLAGS): Use -std=gnu++11.

	* sanitizer_common/Makefile.am (AM_CXXFLAGS): Use -std=gnu++11.
	* asan/Makefile.am (AM_CXXFLAGS): Ditto.
	* lsan/Makefile.am (AM_CXXFLAGS): Ditto.
	* interception/Makefile.am (AM_CXXFLAGS): Ditto.
	* tsan/Makefile.am (AM_CXXFLAGS): Ditto.
	* libbacktrace/Makefile.am (AM_CXXFLAGS): Ditto.
	* ubsan/Makefile.am (AM_CXXFLAGS): Ditto.
	* sanitizer_common/Makefile.in: Regenerate.
	* asan/Makefile.in: Ditto.
	* lsan/Makefile.in: Ditto.
	* interception/Makefile.in: Ditto.
	* tsan/Makefile.in: Ditto.
	* libbacktrace/Makefile.in: Ditto.
	* ubsan/Makefile.in: Ditto.

From-SVN: r217562