mplayer2: cleanup empty directories

The mplayer "make install" phase leaves an empty
/usr/lib directory seemingly regardless of the setting
of libdir.  Remove it to avoid a packaging warning.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
Signed-off-by: Awais Belal <awais_belal@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-multimedia/mplayer/mplayer2_git.bb

@@ -141,4 +141,5 @@ do_install() {
     install ${S}/etc/input.conf ${D}/usr/etc/mplayer/
     install ${S}/etc/example.conf ${D}/usr/etc/mplayer/
     install ${S}/etc/codecs.conf ${D}/usr/etc/mplayer/
+    [ -e ${D}/usr/lib ] && rmdir ${D}/usr/lib
 }