Update *.cmake.in scripts to account for spaces in name

Change the UnitTest.make.in and the XINDEXScript.cmake.in files to enclose
the references to system paths in quotation marks.  Without these, the
XINDEX and MUnit tests will fail. Some specific locations:

The include() of the CommonFunctions.cmake file
the working directory/output file of the MUnit import

OSEHRA-Id: http://issues.osehra.org/browse/OAT-87
Change-Id: If17066fee2f5302afd08ca2585373dd1e3d7d32c