Port bitfield fixes from mainline.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/branches/release_33@182391 91177308-0d34-0410-b5e6-96231b3b80d8
Port debug info fixes from mainline.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/branches/release_33@182392 91177308-0d34-0410-b5e6-96231b3b80d8
Port gcc-4.8 support from mainline.


git-svn-id: https://llvm.org/svn/llvm-project/dragonegg/branches/release_33@182393 91177308-0d34-0410-b5e6-96231b3b80d8