2015-08-31  Richard Biener  <rguenther@suse.de>

	* lto-streamer.h (lto_location_cache::cached_location::sysp): Add.
	(lto_location_cache::current_sysp): Likewise.
	(output_block::current_sysp): Likewise.
	* lto-streamer-in.c (lto_location_cache::cmp_loc): Compare sysp.
	(lto_location_cache::apply_location_cache): Properly record
	system header locations.
	(lto_location_cache::input_location): Input whether a file
	is a system header.
	* lto-streamer-out.c (lto_output_location): Stream whether a file
	is a system header.

From-SVN: r227338