test_translator.py: disable fn ptr cast warning

we actually want to test code of this form, so ask the C compiler to accept it

scripts/test_translator.py

@@ -323,7 +323,7 @@ def _generate_cc_db(self, c_file_path: str) -> None:
         compile_commands = """ \
         [
           {{
-            "arguments": [ "cc", "-D_FORTIFY_SOURCE=0",{3} "-c", {2}"{0}" ],
+            "arguments": [ "cc", "-Wno-incompatible-function-pointer-types", "-D_FORTIFY_SOURCE=0",{3} "-c", {2}"{0}" ],
             "directory": "{1}",
             "file": "{0}"
           }}