CommandLine: Replace cold std::sort with array_pod_sort.

Also replace an old use of qsort with it. Compiles down to the same thing but
gives us some type safety. Safes a couple of kb on CommandLine.o.

NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232236 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed