Make continuations in constructor initializers consistent.

Before:
Constructor
    : LooooooooooooooooooooongVariable(
        LooooooooooooooooooooongValue) {}

After:
Constructor
    : LooooooooooooooooooooongVariable(
          LooooooooooooooooooooongValue) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173685 91177308-0d34-0410-b5e6-96231b3b80d8