Fixed mimetype for rar files.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 1b3cc36b14)

amarok/src/mediadevice/daap/mongrel/lib/mongrel/mime_types.yml

@@ -380,7 +380,7 @@
 .ra: audio/x-pn-realaudio-plugin
 .ra: audio/x-realaudio
 .ram: audio/x-pn-realaudio
-.rar: application/x-rar-compressed
+.rar: application/x-rar
 .ras: application/x-cmu-raster
 .ras: image/cmu-raster
 .ras: image/x-cmu-raster