* config/darwin-protos.h, config/c4x/c4x-protos.h,
	config/cris/cris-protos.h, config/i370/i370-protos.h,
	config/i960/i960-protos.h, config/ia64/ia64-protos.h,
	config/v850/v850-protos.h: Use struct, and don't conditionally
	compile on GCC_C_PRAGMA_H.

From-SVN: r60762