clang-format: Correctly understand arrays of pointers.

Before:
  A<int * []> a;

After:
  A<int *[]> a;

This fixes llvm.org/PR19360.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205761 91177308-0d34-0410-b5e6-96231b3b80d8