ruby/gem2tgz: Fixed chown syntax

Signed-off-by: Robby Workman <rworkman@slackbuilds.org>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

ruby/gem2tgz/gem2tgz.SlackBuild

@@ -35,7 +35,7 @@ mkdir -p $TMP $PKG $OUTPUT
 cd $TMP
 tar xvf $CWD/$SRCNAM
 cd $PRGNAM-$VERSION
-chown -R root.root .
+chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \