Added constants required to fix the build of networkingsrv and netprotocols
VARIANT A2EXTENDS groupAVIRTUALBUILD_INCLUDE set /epoc32/include/A2/buildBUILD_INCLUDE append /epoc32/include/A2/build2ROM_INCLUDE set /epoc32/include/A2/romVARIANT_HRH /epoc32/include/e32std.h