Cairo has a number of nifty features predicated on support for atomic
operations on integer types. Normally, such support would be determined
by cairo's configure script. But since we don't run cairo's configure
script, we need to manually define HAVE_INTEL_ATOMIC_PRIMITIVES during
cairo's build. That macro enables codepaths that depend on certain
SIZEOF_* variables being defined by autoconf, so we also need to add the
necessary code in moz.build to set those.
--HG--
extra : rebase_source : 2f00c4e48145b9f72839c57a619058a7bdec8efd
b3d7979acb