* cgraph.c: Fix comment typos.
	* cgraph.h: Likewise.
	* cgraphunit.c: Likewise.
	* ipa-cp.c: Likewise.
	* ipa-inline.c: Likewise.
	* ipa-prop.c: Likewise.
	* ipa-pure-const.c: Likewise.
	* ipa-ref.c: Likewise.
	* ipa-reference.c: Likewise.

From-SVN: r170052