backends: Add x32_corenote.c

This patch adds x32_corenote.c to support x32 coredump.  X32 coredump is
a hybrid between ia32 coredump and x86-64 coredump.  The exact formats
are described in bfd/hosts/x86-64linux.h in GNU binutils source tree.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
6 files changed