add a CI runner testing that Meson runs correctly under PyPy3

Silence a couple of framework tests that need to be skipped since we
don't install their dependencies for pypy3.

.github/workflows/os_comp.yml

@@ -56,6 +56,21 @@ jobs:
     - name: Upload coverage report
       run: ./ci/upload_cov.sh "OS Comp [${{ matrix.cfg.name }}]"
 
+  pypy:
+    name: 'Arch / PyPy'
+    runs-on: ubuntu-latest
+    container: mesonbuild/arch:latest
+    env:
+      MESON_CI_JOBNAME_UPDATE: linux-arch-gcc-pypy
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Run tests
+      run: |
+        source /ci/env_vars.sh
+        export MESON_CI_JOBNAME=$MESON_CI_JOBNAME_UPDATE
+        pypy3 run_tests.py
+
   ubuntu-rolling:
     name: 'Ubuntu Rolling'
     runs-on: ubuntu-latest

test cases/frameworks/11 gir subproject/test.json

@@ -9,5 +9,5 @@
     {"type": "expr", "file": "usr/lib/?libgirlib.so"},
     {"type": "file", "platform": "cygwin", "file": "usr/lib/libgirsubproject.dll.a"}
   ],
-  "skip_on_jobname": ["azure", "cygwin", "macos", "msys2"]
+  "skip_on_jobname": ["azure", "cygwin", "macos", "msys2", "pypy"]
 }

test cases/frameworks/7 gnome/test.json

@@ -36,5 +36,5 @@
     {"type": "file", "file": "usr/include/simple-resources.h"},
     {"type": "file", "file": "usr/include/generated-gdbus.h"}
   ],
-  "skip_on_jobname": ["azure", "cygwin", "macos", "msys2"]
+  "skip_on_jobname": ["azure", "cygwin", "macos", "msys2", "pypy"]
 }