ensure objc is here

Author: dreamer-coding

.github/workflows/meson_ci.yml

@@ -73,9 +73,11 @@ jobs:
       - name: Install Xcode
         run: sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
 
-      - name: Install Meson and Ninja
+      - name: Install Meson, Ninja, and Objective-C compilers
         run: |
           python -m pip install meson ninja
+          brew install llvm
+          brew install libobjc2
   
       - name: Set Objective-C and Objective-C++ compilers
         run: |