Security update for GraphicsMagick

This update for GraphicsMagick fixes the following issues:

- CVE-2017-8350: denial of service via crafted PNG file (boo#1036985)
- CVE-2017-8351: denial of service via crafted PCD file (boo#1036986)
- CVE-2017-8353: denial of service via crafted PICT file (boo#1036988)
- CVE-2017-8355: denial of service via crafted MTV file (boo#1036990)

Fixed bugs
bnc#1036986
VUL-1: CVE-2017-8351: ImageMagick, GraphicsMagick: denial of service (memory leak) via a crafted file (ReadPCDImage func in pcd.c)
bnc#1036990
VUL-1: CVE-2017-8355: ImageMagick, GraphicsMagick: denial of service (memory leak) via a crafted file (ReadMTVImage func in mtv.c)
bnc#1036985
VUL-1: CVE-2017-8350: ImageMagick, GraphicsMagick: denial of service (memory leak) via a crafted file (ReadJNGImage function in png.c)
bnc#1036988
VUL-1: CVE-2017-8353: ImageMagick, GraphicsMagick: denial of service (memory leak) via a crafted file (ReadPICTImage func in pict.c)
Selected Binaries
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