[PATCH] fix check-mime-type.pl: also check property-modified files

Dear Subversion developers,

please apply the attached patch for the hook script check-mime-type.pl.
The patch also checks files that have their properties changed, so
nobody can circumvent the policy via committing changes.
I have been using it on Linux (and with additional changes on Windows)
for over 6 years now.

Kind regards
Matthias Bücher

Log Message:
Check also property-modified files in hook script check-mime-type.pl

* contrib/hook-scripts/check-mime-type.pl:
   (proplist) add property-modified files for checks

Patch by: Matthias Bücher <maddes+subversion_at_maddes.net>
Suggested by: Leo Davis [1]

[1]
https://mail-archives.apache.org/mod_mbox/subversion-dev/201403.mbox/%3C1576503.m6XB7udPXQ@hurry.speechfxinc.com%3E