Go bindings: use MDNode::replaceAllUsesWith instead of MDTuple::replaceAllUsesWith.

Fixes llgo following Duncan's changes to debug info in r231082. llgo needs
to replace composite types, which are no longer represented using MDTuple.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231416 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed