core: Fix memory leaks

g_key_file_get_string allocates memory that must be freed.

asprintf allocates memory that must be freed.

src/main.c

@@ -795,6 +795,7 @@ static void parse_config(GKeyFile *config)
 
 	parse_br_config(config);
 	parse_le_config(config);
+	g_free(str);
 }
 
 static void init_defaults(void)

src/shared/shell.c

@@ -621,6 +621,7 @@ void bt_shell_prompt_input(const char *label, const char *msg,
 		prompt->user_data = user_data;
 
 		queue_push_tail(data.prompts, prompt);
+		free(str);
 
 		return;
 	}