clang-format: Fix indentation relative to unary expressions.

This should be done, only if we are still in the unary expression's
scope.

Before:
  bool aaaa = !aaaaaaaa(  // break
                   aaaaaaaaaaa);
  *aaaaaa = aaaaaaa( // break
       aaaaaaaaaaaaaaaa);

After:
  bool aaaa = !aaaaaaaa(  // break
                   aaaaaaaaaaa); // <- (unchanged)
  *aaaaaa = aaaaaaa( // break
      aaaaaaaaaaaaaaaa); // <- (no longer indented relative to "*")

llvm-svn: 189108