gelf_getmove.c: Handle ELFCLASS32 and ELFCLASS64 separately

gelf_getmove.c: Handle ELFCLASS32 and ELFCLASS64 separately

Currently gelf_getmove does not distinguish between ELFCLASS32 and
ELFCLASS64 binaries.  This is assumes that Elf32_Move and Elf64_Move
structs are the same size.

This assumption is false since the m_info and m_poffset fields have
type uint32_t for Elf32_Move but uint64_t for Elf64_Move.

Fix this by handling ELFCLASS32 and ELFCLASS64 cases separately when
copying Elfxx_Move fields to dst.

Signed-off-by: Aaron Merey <amerey@redhat.com>