test_6 happy meson

Author: LukashonakV

.github/workflows/build-and-test.yml

@@ -71,7 +71,7 @@ jobs:
     - name: build cavacore test application
       run: gcc -I include -c -g cavacore_test.c
     - name: link cavacore test application
-      run: gcc -o cavacore_test cavacore_test.c build/libcava.so.p/cavacore.c.o -lm -lfftw3
+      run: gcc -I include -o cavacore_test cavacore_test.c build/libcava.so.p/cavacore.c.o -lm -lfftw3
     - name: run cavacore test application
       run: ./cavacore_test
   build-macos: