[NFC] DCE: TermInsts increment NumDeletedInsts.

Author: nate-chandler

lib/SILOptimizer/Transforms/DeadCodeElimination.cpp

@@ -763,6 +763,7 @@ bool DCE::removeDead() {
                    << "with jump to: BB" << postDom->getDebugID() << "\n");
 
         replaceBranchWithJump(termInst, postDom);
+        ++NumDeletedInsts;
         termInst->eraseFromParent();
         BranchesChanged = true;
         Changed = true;