Add newline at the end of the files. Add -Wno-unused-command-line-argument to programs compilation flow, to support clang.

programs/tests/t_kill.c

@@ -62,4 +62,4 @@ int main(int argc, char *argv[])
     wait(&status);
     printf("main : end (%d)\n", status);
     return 0;
-}
+}