clang-format: Indent relative to unary operators.

Before:
  if (!aaaaaaaaaa(  // break
          aaaaa)) {
  }

After:
  if (!aaaaaaaaaa(  // break
           aaaaa)) {
  }

Also cleaned up formatting using clang-format.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188891 91177308-0d34-0410-b5e6-96231b3b80d8