[bindings] Fix some issues with the bindings.
[bindings] Fix some issues with the bindings.

 - We aren't currently dealing with handles correctly, but the bindings at this
   point are really just for experimentation so we just store them globally to
   avoid them being deallocated.

apple/swift-llbuild,apple/swift-llbuild,apple/swift-llbuild,apple/swift-llbuild,apple/swift-llbuild,apple/swift-llbuild,apple/swift-llbuild