cppbuiltin.c: New file.

cppbuiltin.c: New file.

gcc/
	* cppbuiltin.c: New file.
	* cppbuiltin.h: New file.
	* Makefile.in: Take into account cppbuiltin.{h,c}.

gcc/c-family/
	* c-cppbuiltin.c (define__GNUC__, builtin_define_type_precision):
	Remove.
	(c_cpp_builtins): Call functions from cppbuiltin.c instead
	of duplicating code.

gcc/fortran/
	* cpp.c (cpp_define_builtins): Call functions from cppbuiltin.c
	instead of duplicating code.
	* Make-lang.in: Add dependency on cppbuiltin.h. Don't define
	BASEVER.

From-SVN: r164917