[jhBuild] cairo build error (-flto)
https://bugs.webkit.org/show_bug.cgi?id=139056

Patch by Fabien Vallée <fvallee@connected-labs.com> on 2014-12-29
Reviewed by Philippe Normand.

cairo fails to link  with gcc 4.9 due to lto
related issue. This problem has been partially
addressed by cairo:
http://cgit.freedesktop.org/cairo/commit/?id=c3645d97ebd24c6f7ad850785d585aebc706a11c
use the cairo --disable-lto option and remove jhbuild
makeargs fixes the issue.

* gtk/jhbuild.modules:
* gtk/patches/cairo-1.12.8-add_disable-lto.patch: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@177789 268f45cc-cd09-0410-ab3c-d52691b4dbfc