Log Message:
-----------
Don't install files for xml2 when building without libxml.
Modified Files:
--------------
pgsql/src/tools/msvc:
Install.pm (r1.8 -> r1.9)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/msvc/Install.pm.diff?r1=1.8&r2=1.9)