Security update for GraphicsMagick

This update for GraphicsMagick fixes the following issue:

Security issue fixed:

- CVE-2018-20467: Fixed infinite loop in coders/bmp.c (boo#1120381)

Fixed bugs
bnc#1120381
VUL-1: CVE-2018-20467: imagemagick,graphicsmagick: infinite loop and hang in coders/bmp.c
Selected Binaries
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