Provide support for info os processes

src/e-server:
	* src/GdbServer.cpp (GdbServer::rspQuery): Tidy up
	error message, report support for qXferosdata:read with
	qSupported, handle qXfer.
	(GdbServer::rspTransfer): Created.
	(GdbServer::rspOsDataProcesses): Created.
	* src/e-server/src/GdbServer.h: Add rspTransfer and
	rspOsDataProcesses.
	* src/e-server/src/RspPacket.cpp (RspPacket::packNStr): Created.
	* src/e-server/src/RspPacket.h: Add packNStr.
	* src/e-server/src/TargetControl.h: Add listCoreIds.
	* src/e-server/src/TargetControlHardware.cpp
	(TargetControlHardware::listCoreIds): Created.
	* src/e-server/src/TargetControlHardware.h: Add listCoreIds.