meson CI: add /analyze for MSVC

Useful in CI.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

.github/workflows/on_PR_meson.yaml

@@ -51,6 +51,8 @@ jobs:
           arch: ${{matrix.platform}}
 
       - name: Compile and Test
+        env:
+          CXXFLAGS: '/analyze'
         run: |
           meson setup "${{github.workspace}}/build" --wrap-mode=${{matrix.deps}} -Ddefault_library=${{matrix.type}} -Dwarning_level=3 -Dcpp_std=c++20
           meson compile -C "${{github.workspace}}/build" --verbose