imagemagick: bump version to 7.0.3-7 (security)

oss-security reference:
  http://www.openwall.com/lists/oss-security/2016/11/13/1

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2 files changed