unify the various c-string compares and hashes.

(cherry picked from commit b7e3470a)

Conflicts:
	oox/inc/oox/export/shapes.hxx
	oox/source/export/shapes.cxx
	sal/inc/rtl/string.hxx
	sdext/source/minimizer/pppoptimizertoken.cxx
	svx/source/customshapes/EnhancedCustomShapeTypeNames.cxx
	vcl/source/glyphs/gcach_ftyp.cxx
	writerfilter/source/resourcemodel/TagLogger.cxx
	xmloff/source/draw/EnhancedCustomShapeToken.cxx

Change-Id: Ib742744077bfb4d38a462d88b44bdef45601b4ae