dump_skip(): dump_seek() replacement taking coredump_params

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc arch/x86/ia32/ia32_aout.c
Simple merge

diff --cc fs/binfmt_aout.c
Simple merge

diff --cc fs/binfmt_elf.c
Simple merge

diff --cc fs/binfmt_elf_fdpic.c
Simple merge

diff --cc fs/coredump.c
Simple merge

diff --cc include/linux/coredump.h
Simple merge