Removed quotes from svn:keywords props on a few files.

Subversion doesn't do quote processing, so it actually thinks that the
closing quote in 'Revision"' is a part of the keyword.


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@395686 f38db490-d61c-443f-a65b-d21fe96a405b