chmod -x for .patch, .pptm, and .vb

Change-Id: I98e1221e48df22e8b58aaf305898cbe301f187ce
Reviewed-on: https://gerrit.libreoffice.org/52568Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>