Fix misc stuff seen by clang-static-analyzer.

2019-06-27  Martin Liska  <mliska@suse.cz>

	* lto-dump.c (struct symbol_entry): Add default dtor.
	(struct variable_entry): Likewise.
	(struct function_entry): Likewise.
	(dump_list_functions): Release memory.
	(dump_list_variables): Likewise.
2019-06-27  Martin Liska  <mliska@suse.cz>

	* libgcov-util.c (gcov_profile_merge): Release allocated
	memory.
	(calculate_overlap): Likewise.

From-SVN: r272733