Don't align "} // namespace" comments.

This is not all bad, but people are often surprised by it.

Before:
namespace {
int SomeVariable = 0; // comment
}                     // namespace

After:
namespace {
int SomeVariable = 0; // comment
} // namespace

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185327 91177308-0d34-0410-b5e6-96231b3b80d8