ci: Add async-io tests back to CI

Closes #145

Signed-off-by: John Nunley <[email protected]>

.github/workflows/ci.yml

@@ -72,6 +72,14 @@ jobs:
       - name: Check haiku
         if: startsWith(matrix.rust, 'nightly') && matrix.os == 'ubuntu-latest'
         run: cargo check -Z build-std --target x86_64-unknown-haiku
+      - name: Clone async-io
+        run: git clone https://github.com/smol-rs/async-io.git
+        # The async-io Cargo.toml already has a patch section at the bottom, so we
+        # can just add this.
+      - name: Patch polling
+        run: echo 'polling = { path = ".." }' >> async-io/Cargo.toml
+      - name: Test async-io
+        run: cargo test --manifest-path=async-io/Cargo.toml
 
   cross:
     runs-on: ${{ matrix.os }}