Check honggfuzz version of fuzz target in CI

Author: dtolnay

.github/workflows/ci.yml

@@ -99,7 +99,10 @@ jobs:
       - run: cargo fuzz check
       - run: cargo check --no-default-features --features afl
         working-directory: fuzz
-
+      - uses: dtolnay/install@honggfuzz
+      - run: sudo apt-get install binutils-dev libunwind-dev
+      - run: cargo hfuzz build --no-default-features --features honggfuzz
+        working-directory: fuzz
 
   clippy:
     name: Clippy