Format.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201750 91177308-0d34-0410-b5e6-96231b3b80d8
Make DIELoc/DIEBlock's ComputeSize method const. Add a setSize
method to actually set it in the class to avoid computing it
multiple times.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201751 91177308-0d34-0410-b5e6-96231b3b80d8