install libc++ for clang build fuzzer

Author: hathach

.github/workflows/pre-commit.yml

@@ -33,6 +33,7 @@ jobs:
 
     - name: Build Fuzzer
       run: |
+        sudo apt install libc++-dev libc++abi-dev
         clang --version
         export CC=clang
         export CXX=clang++