Update cairo* to 1.14.6:

Release 1.14.6    (2015-12-09  Bryce Harrington <bryce@osg.samsung.com>)
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Simple bugfix release to fix one Windows issue.

Bug Fixes
---------
* Fix failure on Windows due to reference of the function
  cairo_win32_surface_create_with_format(), which isn't included in the
  1.14.4 release. (Bug #92771)

(wiz)