ccache: applied a number of patches from the ccache-win32 issue tracker

On Windows XP ccache crashed when used in compiling git. Applying the patch
from ccache-win32 issue #8 resolved this problem and a number of other
patches from this tracker have been included.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
Install ccache-win32 (SVN revision 2)

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>