llvm-dis: Use the new `DebugLoc` API, NFC

Update tools/llvm-dis to use the new `DebugLoc` API.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233590 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed