Update clone-mlir.sh

Author: mgehre-amd

utils/clone-mlir.sh

@@ -1,3 +1,3 @@
-git clone -n https://github.com/xilinx/llvm-aie.git
+git clone -n https://github.com/xilinx/llvm-aie.git llvm-project
 # Check out a specific branch that is known to work with ONNX-MLIR.
 cd llvm-project && git checkout 776b07b472a12db1a451fb4bfc737e05c0ee0b1c && cd ..