Security update for cairo

This update for cairo fixes the following issues:

- Fix a memory corruption in pango.
- Revert "Correctly decode Adobe CMYK JPEGs in PDF export".
- Add more FreeeType font color conversions to support COLR/CPAL.
- Fix crash when rendering Microsoft's Segoe UI Emoji Regular font.
- Fix memory leaks found by Coverity.
- Fix assertion failure in the freetype backend. (fdo#105746).
- Add cairo-CVE-2017-9814.patch: Replace malloc with _cairo_malloc and check cmap size before allocating (bsc#1049092)

This update was imported from the SUSE:SLE-15:Update update project.

Fixed bugs
bnc#1049092
VUL-1: CVE-2017-9814: cairo: cairo-truetype-subset.c in cairo 1.15.6 and earlier out-of-bounds read
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