[Matrix] Use print instead of dump for matrix-print-after-transpose-opt

We should be able to use this option even if LLVM_ENABLE_DUMP is not on.

(should fix the bots too)

Author: francisvm

llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp

@@ -893,7 +893,7 @@ class LowerMatrixIntrinsics {
       optimizeTransposes();
       if (PrintAfterTransposeOpt) {
         dbgs() << "Dump after matrix transpose optimization:\n";
-        Func.dump();
+        Func.print(dbgs());
       }
     }