[PATCH] fix error case in binfmt_elf.c:load_elf_interp

[PATCH] fix error case in binfmt_elf.c:load_elf_interp

From: Roland McGrath <roland@redhat.com>

Julie DeWandel noticed that in the error case where elf_map has failed,
load_elf_interp will (at the out_close: label) return the `error' variable,
but that will contain the result of a prior operation and not the error
number from elf_map.