clang-format: Add option to disable alignment after opening brackets

Before:
  SomeFunction(parameter,
               parameter);

After:
  SomeFunction(parameter,
      parameter);

Patch by Harry Terkelsen, thank you!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222284 91177308-0d34-0410-b5e6-96231b3b80d8