Fix broken libgccjit 12 CI

Author: antoyo

.github/workflows/gcc12.yml

@@ -67,9 +67,10 @@ jobs:
     - name: Build
       run: |
         ./y.sh prepare --only-libcore --libgccjit12-patches
-        ./y.sh build --sysroot --no-default-features --sysroot-panic-abort
+        ./y.sh build --no-default-features --sysroot-panic-abort
         # Uncomment when we no longer need to remove global variables.
         #./y.sh build --sysroot --no-default-features --sysroot-panic-abort
+        #./y.sh build --sysroot --no-default-features --sysroot-panic-abort
         #cargo test --no-default-features
         #./y.sh clean all