Add a more reliable ImageMagick mirror.
Add a more reliable ImageMagick mirror.

The version we're running is old enough to have gone missing from most
of the mirrorlist; ftp://ftp.sunet.se still has it, but fails
intermittently when curl tries to use EPSV.

zalora/microgram,zalora/microgram,zalora/microgram,zalora/microgram