gcc.c, [...]: Add zero initializer for cpp_spec field to all array elements.

gcc.c, [...]: Add zero initializer for cpp_spec field to all array elements.

	* gcc.c, cp/lang-specs.h, f/lang-specs.h, java/lang-specs.h,
	objc/lang-specs.h: Add zero initializer for cpp_spec field to
	all array elements.
	* cp/lang-specs.h: Don't put an #ifdef inside the initializer
	list; set a default for CPLUSPLUS_CPP_SPEC and use it.

From-SVN: r40173