revert the change to rofsbuild image format, but add checking codes to prevent address overflow
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