Present coreId as a pair of decimals.

src/e-server:
	* src/GdbServer.cpp (GdbServer::rspOsDataProcesses):
	Replace intStr with coreIdStr when presenting core IDs.
	(GdbServer::rspOsDataLoad): Likewise.
	(GdbServer::rspOsDataTraffic): Likewise.
	(GdbServer::intStr): Declare const.
	(GdbServer::coreIdStr): Created.
	* src/GdbServer.h: Declare intStr const, add coreIdStr.