Adding sticky tests

Author: udesou

.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
       - v1.8.2\+RAI
       - v1.9.2\+RAI
       - dev
+      - upstream-ready/sticky
 
 concurrency:
   # Cancels pending runs when a PR gets updated.

mmtk/build.rs

@@ -85,6 +85,8 @@ fn main() {
             .clang_arg("-std=c++14")
             // using MMTK types
             .clang_arg("-DMMTK_GC")
+            // using Immix, but the types should be the same for either GC
+            .clang_arg("-DMMTK_PLAN_IMMIX")
             // Finish the builder and generate the bindings.
             .generate()
             // Unwrap the Result and panic on failure.