Tidy up setting of all-stop/non-stop mode.

src/e-server:
	* src/GdbServer.cpp (GdbServer::rspQuery): Fix typos in previous
	commit, stop attached processes in all stop mode.
	(GdbServer::stopAttachedProcesses): Created as dummy.
	* src/GdbServer.h: Add stopAttachedProcesses, delete printfWrapper
	declaration, since no-longer needed.