Makefile.in: Rename cpp to cpp0, tradcpp to tradcpp0, and xcpp to cpp throughout.

Makefile.in: Rename cpp to cpp0, tradcpp to tradcpp0, and xcpp to cpp throughout.

	* Makefile.in: Rename cpp to cpp0, tradcpp to tradcpp0, and
	xcpp to cpp throughout.
	(native): Remove unnecessary dependency on cpp.

	* gcc.c (trad_capable_cpp, C specs): Rename cpp to cpp,
	tradcpp to tradcpp0.
	(.i spec): Add missing output-file spec to cc1 command line.

	* ch/lang-specs.h, cp/lang-specs.h, f/lang-specs.h,
	objc/lang-specs.h: Rename cpp to cpp0 and/or tradcpp to tradcpp0.

From-SVN: r35389