natStackTrace.cc: Include platform.h immediately after config.h.

	* gnu/gcj/runtime/natStackTrace.cc: Include platform.h immediately
	after config.h.  Use <> for consistency.
	* java/lang/natObject.cc: Likewise.
	* java/lang/natRuntime.cc: Likewise.
	* java/lang/natSystem.cc: Likewise.
	* java/util/natTimeZone.cc: Likewise.
	* win32.cc: Likewise.
	* include/posix.h (fcntl, socket, connect, close, bind, accept,
	listen, write, read): Undef to avoid interference from OS macros.

From-SVN: r63122