Don't try to align builder-type continuations on assignments.

Before:
int aaaa = aaaaa().aaaaa() // force break
           .aaaaa();
After:
int aaaa = aaaaa().aaaaa() // force break
    .aaaaa();

The other indent is just wrong and confusing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173273 91177308-0d34-0410-b5e6-96231b3b80d8