gdb/
	Fix GDB regression related to PR binutils/14813.
	* jit.c (mem_bfd_iovec_close): Return 0 for success.
	* minidebug.c (lzma_close): Add return value comment.
	* remote.c (remote_bfd_iovec_close): Return 0 for success.
	* solib-spu.c (spu_bfd_iovec_close): Likewise.
	* spu-linux-nat.c (spu_bfd_iovec_close): Likewise.