install ninja-build in CI

.github/workflows/CI.yml

@@ -18,6 +18,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: INSTALL_NINJA
+      run: sudo apt install ninja-build
   
     - name: install_google_benchmark
       run: |

.github/workflows/TEST.yml

@@ -18,6 +18,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: INSTALL_NINJA
+      run: sudo apt install ninja-build
   
     - name: install_google_benchmark
       run: git clone --branch v1.6.1 https://github.com/google/benchmark.git && cd benchmark && cmake -E make_directory "build" && cmake -E chdir "build" cmake -DBENCHMARK_DOWNLOAD_DEPENDENCIES=on -DCMAKE_BUILD_TYPE=Release ../ && cmake --build "build" --config Release && sudo cmake --build "build" --config Release --target install