Fixing CMake build on CI

By fetching more revisions for when the revision needed is newer
than the one checked in in the llvm submodule.

As well, rename build directory for cmake build in case it clashes
with any build dirs for the bazel build.

.github/workflows/build_and_test_cmake.yml

@@ -47,14 +47,15 @@ jobs:
           LLVM_COMMIT=$(grep LLVM_COMMIT ${GITHUB_WORKSPACE}/bazel/import_llvm.bzl | head -n 1 | cut -d'"' -f 2 )
           git submodule update --init --recursive
           cd externals/llvm-project
+          git fetch
           git checkout ${LLVM_COMMIT}
           mkdir build && cd build
           cmake -G Ninja ../llvm -DLLVM_ENABLE_PROJECTS=mlir -DLLVM_BUILD_EXAMPLES=ON -DLLVM_ENABLE_ASSERTIONS=ON -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_RTTI=ON -DLLVM_TARGETS_TO_BUILD="host"
           cmake --build . --target check-mlir
 
       - name: Build and test mlir-tutorial
         run: |
-          mkdir build && cd build
+          mkdir build-cmake && cd build-cmake
           cmake -DLLVM_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/llvm -DMLIR_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/mlir -DBUILD_DEPS="ON" ..
           cmake --build . --target MLIRAffineFullUnrollPasses
           cmake --build . --target MLIRMulToAddPasses