Remove executable bits on data file

Change-Id: Id6d8ccc82f892b098d96e28a7222c58e08e22b09
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/161086
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
diff --git a/sw/qa/extras/rtfexport/data/tdf158762.rtf b/sw/qa/extras/rtfexport/data/tdf158762.rtf
old mode 100755
new mode 100644