* ipa-fnsummary.h (enum ipa_hints_vals): Fix comment typo,
	preffer -> prefer.
	* ipa-inline.c (edge_badness): Likewise.
	* lto-streamer.h (class lto_location_cache): Likewise.
	* tree-ssa-sink.c (select_best_block): Likewise.  Fix comment typos,
	gratutious -> gratuitous.

From-SVN: r278546