scripts/setlocalversion: update deprecated git-<command> usage

Git is moving away from the git-<command> to git <command>

git-svn -> git svn

scripts/setlocalversion

@@ -17,7 +17,7 @@ if head=`git rev-parse --verify HEAD 2>/dev/null`; then
 
 	# Is this git on svn?
 	if git config --get svn-remote.svn.url >/dev/null; then
-	        printf -- '-svn%s' "`git-svn find-rev $head`"
+	        printf -- '-svn%s' "`git svn find-rev $head`"
 	fi
 
 	# Are there uncommitted changes?