Update c-cpp.yml

Author: uNetworkingAB

.github/workflows/c-cpp.yml

@@ -39,7 +39,7 @@ jobs:
     - name: install libuv
       run: ls /opt/homebrew/opt/libuv
     - name: build examples
-      run: CFLAGS=-I$(brew --prefix libuv)/include -L$(brew --prefix libuv)/lib WITH_LIBUV=1 WITH_ASAN=1 make examples
+      run: CFLAGS+=-I$(brew --prefix libuv)/include CFLAGS+=-L$(brew --prefix libuv)/lib WITH_LIBUV=1 WITH_ASAN=1 make examples
     - name: run test
       run: ./hammer_test && ./hammer_test_unix