call.c, [...]: Replace "GNU CC" with "GCC" in the copyright header.

call.c, [...]: Replace "GNU CC" with "GCC" in the copyright header.

	* call.c, class.c, cp-lang.c, cp-tree.h, cvt.c, dump.c, error.c,
	  except.c, expr.c friend.c, g++spec.c, init.c, lang-options.h,
	  lang-specs.h, lex.c, mangle.c, method.c, optimize.c, parser.c,
	  pt.c, ptree.c, repo.c, rtti.c, search.c, semantics.c, tree.c,
	  typeck.c, typeck2.c: Replace "GNU CC" with "GCC" in the
	  copyright header.
	* lex.h: parse.y is dead, so don't mention it.  Also replace the
	  copyright header with the default GNU copyright header.

From-SVN: r60738