ltrace: Add missing mips->mipsel symlink

Restore missing mips->mipsel symlink. It appears ltrace was
packaged incorrectly and the symlink got lost. See
http://lists.alioth.debian.org/pipermail/ltrace-devel/2013-August/000938.html



[Peter: add a comment explaining why]
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>