LDPI resources converted from HDPI, patch 2.

Images have been resized w/ imagemagick and optimized w/ optiong
(check patch 1 for details). This second (and last) patchset
covers the images which exist both in drawable-hdpi and drawable-ldpi
where the ldpi ones were remains from Gingerbread or didn't match
the hdpi version.

Change-Id: Iea12a98f063aeb446082d570250420c2e1242761
Merge "LDPI resources converted from HDPI, patch 2." into cm-10.1