Hard code mmtk-core repo/ref for testing

Author: qinsoon

.github/workflows/build.yml

@@ -42,6 +42,7 @@ jobs:
       run: |
         pip3 install tomlkit
         python3 .github/scripts/patch-mmtk-dep.py mmtk/Cargo.toml ${{ inputs.mmtk-core-ref }} ${{ inputs.mmtk-core-repo }}
+        cat mmtk/Cargo.toml
       working-directory: ./git/mmtk-openjdk
     - name: Setup environment
       run: ./.github/scripts/ci-setup.sh

.github/workflows/test-core-extended.yml

@@ -22,8 +22,10 @@ jobs:
     uses: ./.github/workflows/build.yml
     with:
       debug-level: fastdebug
-      mmtk-core-repo: ${{ inputs.mmtk-core-repo }}
-      mmtk-core-ref: ${{ inputs.mmtk-core-ref }}
+      # mmtk-core-repo: ${{ inputs.mmtk-core-repo }}
+      # mmtk-core-ref: ${{ inputs.mmtk-core-ref }}
+      mmtk-core-repo: qinsoon/mmtk-core
+      mmtk-core-ref: 4156c28e90235c51de9740001f62b12d423a0fcc
 
   # Feature build
   build-vo-bit: