Cope with localized Subversion clients.

Originally committed as revision 5859 to svn://svn.ffmpeg.org/ffmpeg/trunk

version.sh

 #!/bin/sh
 
-svn_revision=`cd "$1" && svn info 2> /dev/null | grep Revision | cut -d' ' -f2`
+svn_revision=`cd "$1" && LANG=C svn info 2> /dev/null | grep Revision | cut -d' ' -f2`
 test $svn_revision || svn_revision=UNKNOWN
 
 NEW_REVISION="#define FFMPEG_VERSION \"SVN-r$svn_revision\""