re PR preprocessor/60400 (ICE with trigraphs)

re PR preprocessor/60400 (ICE with trigraphs)

	PR preprocessor/60400
	Backport from mainline
	2013-06-24  Dehao Chen  <dehao@google.com>

	* files.c (_cpp_stack_include): Fix the highest_location when header
	file is guarded by #ifndef and is included twice.

	2014-03-03  Jakub Jelinek  <jakub@redhat.com>

	PR preprocessor/60400
	* c-c++-common/cpp/pr60400.c: New test.
	* c-c++-common/cpp/pr60400-1.h: New file.
	* c-c++-common/cpp/pr60400-2.h: New file.

From-SVN: r208362