cypress.md, [...]: Replace "GNU CC", "GNU Compiler", and "GNU C Compiler" with "GCC".

	* config/sparc/cypress.md, config/sparc/hypersparc.md,
	config/sparc/sparc-modes.def, config/sparc/sparc.c,
	config/sparc/sparc.md, config/sparc/sparclet.md,
	config/sparc/supersparc.md, config/sparc/ultra1_2.md,
	config/sparc/ultra3.md: Replace "GNU CC", "GNU Compiler", and
	"GNU C Compiler" with "GCC".

From-SVN: r68055