Add GCC install to CPU release workflow (#3538)

Summary:
X-link: facebookresearch/FBGEMM#627

- Add GCC install to CPU release workflow

Pull Request resolved: #3538

Reviewed By: sryap

Differential Revision: D67784693

Pulled By: q10

fbshipit-source-id: d15bf8d6532cb8edda753b195ade80a57a29a8c4

.github/workflows/fbgemm_gpu_release_cpu.yml

@@ -161,6 +161,9 @@ jobs:
     - name: Create Conda Environment
       run: . $PRELUDE; create_conda_environment $BUILD_ENV ${{ matrix.python-version }}
 
+    - name: Install C/C++ Compilers for Updated LIBGCC
+      run: . $PRELUDE; install_cxx_compiler $BUILD_ENV ${{ matrix.compiler }}
+
     - name: Install PyTorch Test
       run: . $PRELUDE; install_pytorch_pip $BUILD_ENV ${{ github.event.inputs.pytorch_channel }} cpu