Add configuration option to the base/rom extension to make the toolchain (ARMCC/GCCE) known to the preprocessor stage of romb build.
@rem Used by the buildbot "clean" step.
call "%VS90COMNTOOLS%vsvars32.bat"
@echo Deleting .pyc/.pyo files ...
del /s Lib\*.pyc Lib\*.pyo
cd PCbuild
vcbuild /clean pcbuild.sln "Release|Win32"
vcbuild /clean pcbuild.sln "Debug|Win32"