Cleanup the formatting of obj2yaml.cpp.

I couldn't touch this file and not clean it up some. These reformattings
brought to you by clang-format, with some minor adjustments by me. More
spring cleaning to follow here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179004 91177308-0d34-0410-b5e6-96231b3b80d8
AArch64: remove barriers from AArch64 atomic operations.

I've managed to convince myself that AArch64's acquire/release
instructions are sufficient to guarantee C++11's required semantics,
even in the sequentially-consistent case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179005 91177308-0d34-0410-b5e6-96231b3b80d8