[OCaml] Fix whitespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220766 91177308-0d34-0410-b5e6-96231b3b80d8
[OCaml] Enable -g for debug builds.

We don't care about pre-3.12.1 anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220767 91177308-0d34-0410-b5e6-96231b3b80d8