Fix globbing in POSIX shell

.gitlab-ci.yml

@@ -4,6 +4,6 @@ test:
   script:
     - meson setup build
     - meson compile -C build
-    - cppcheck --error-exitcode=1 **.c
+    - cppcheck --error-exitcode=1 *.c
     - env FML="$(readlink -f ./build/fml)" FML_REF_BC_INT=/cfml/fml /FMLtest/suite ast_interpret
         hello_world.fml