Security update for gdk-pixbuf

This update for gdk-pixbuf provides the following fixes:

- Add overflow checks when creating pixbuf structures in general
- Fix arithmetic overflow in the BMP loader (bsc#1053417)
- Adds support for BMPv3 with bitmasks (bsc#1053417)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

Fixed bugs
bnc#1053417
gdk-pixbuf: Integer multiplication overflow allows for DoS or potentially RCE
Selected Binaries
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