clang-format: Don't indent relative to unary operators.

clang-format: Don't indent relative to unary operators.

It seems like most people see unary operators more like part of the
subsequent identifier and find relative indentation odd.

Before:
  aaaaaaaaaa(!aaaaaaaaaa( // break
                  aaaaa));
After:
  aaaaaaaaaa(!aaaaaaaaaa( // break
                 aaaaa));

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200840 91177308-0d34-0410-b5e6-96231b3b80d8