Exclude src/msw/version.rc from svn pre-commit hook checks.

This file must be remain in CP1252 encoding and not UTF-8 because this is what
Windows uses for showing the strings in it, so exclude it from this check.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74126 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775