Host components now buildable in their correct locations (although stil using CMake). Use build.bat in package root. Note holdingarea build no longer works and everything except llvm will be removed soon. Fix ups to references to components moved to vghwinterface. Move package common headers up to pacakge level inc directory.

holdingarea/build_vs200*
holdingarea/bin/
holdingarea/lib/
holdingarea/vg/bin/c_utils.pyc
holdingarea/build/
build/
hostsupport/hostopenvg/genheader/c_utils.pyc