Use revision.inc include file if REVINC conditional is set

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23953 3ad0048d-3df7-0310-abae-a5850022a9f2
 * Generate revision.inc include file depending on last modified comitted file

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23954 3ad0048d-3df7-0310-abae-a5850022a9f2