For an unknown reason, 'svn propset svn:executable * foo.sh' doesn't work on
Windows. It is even more awkward that 'svn propset svn:executable . foo.sh'
works just fine, in particular, subversion replaces the value, as long as it's
not an empty string, back to '*'.

R=petermayo@chromium.org
BUG=


Review URL: https://chromiumcodereview.appspot.com/10967071

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@158281 0039d316-1c4b-4281-b951-d872f2087c98