cgraphunit.c, [...]: Fix comment typos.

	* cgraphunit.c, dbxout.c, flow.c, gcse.c, gimplify.c,
	lambda-code.c, loop.c, machmode.def, mips-tfile.c,
	modulo-sched.c, passes.c, postreload-gcse.c, tree-eh.c,
	tree-ssa-ccp.c, varasm.c, config/frv/frv.c, config/frv/frv.h,
	config/frv/frv.md, config/i386/i386.c, config/i386/i386.h,
	config/i386/i386.md, config/rs6000/predicates.md,
	config/rs6000/rs6000.c, config/s390/fixdfdi.h,
	config/s390/s390.c, config/stormy16/stormy16.c,
	config/stormy16/stormy16.md, config/vax/vax.md: Fix comment
	typos.

From-SVN: r97362