Take core out of idle state when attaching.

src/e-server:
	* src/GdbServer.cpp (GdbServer::rspAttach): Force
	core out of idle state if necessary.
	(GdbServer::rspSuspend): Replace isTargetIdle by isCoreIdle for
	consistency.
	(GdbServer::rspQThreadExtraInfo): Add info about idle, halted and
	GID state.
	(GdbServer::rspStep): Correct test for expected breakpoint destination.
	(GdbServer::isCoreHalted): Remove test commenting.
	(GdbServer::isCoreIdle): Created.
	(GdbServer::isCoreGIntsEnabled): Created.
	(GdbServer::isTargetIdle): Renamed as isCoreIdle for consistency.
	* src/GdbServer.h: Add FSTATUS register number,
	rename isTargetIdle by isCoreIlde, add isCoreGIntsEnabled.