BaseTools: Extend support for Windows hosted gcc to versions 4.4-4.7.

Revision 16400 adds support for Windows hosted gcc versions 4.8 and 4.9.
With this change, all of the GCCXX tool chains can be used from Windows.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Scott Duplichan <scott@notabs.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/BaseTools@16418 6f19259b-4bc3-4df7-8a09-765794883524