hg: build-infra/jdk8/jdk: Fixed some mac differences. Universal build might still need more attention.

[Henri Gomez]

> I don't know and can't comment on what may happen, but I understand we
> currently only support 64bit on mac. What I fixed in this change was making
> sure libJObjC.dylib is built the same way in the new build system as in the
> old, which in this particular case is a universal lib with both 32 and 64bit
> versions.

So there will be others patchs (code side).

For OpenJDK 7u, I got some here :
http://openjdk-osx-build.googlecode.com/svn/trunk/patches-jdk7u-osx/universal-build.patch