Close memory and resource leaks detected by coverity in the binutils directory.

Close memory and resource leaks detected by coverity in the binutils directory.

	* objcopy.c (add_specific_symbols): Free buffer on exit.
	(add_redefine_syms_file): Close file handle on exit.
	(copy_object): Close file handle on early exit.
	Free buffer on early exit.
	Free gaps buffers once they are no longer needed.
	* dwarf.c (display_debug_frames): Free allocated memory on exit.
	(load_separate_debug_info): Free allocate memory on early exit.