[binutils-gdb] Add support to readelf for reading NetBSD ELF core notes.

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT c6056a744af028824797e769ddb71927740be88a ***

Author: Stephen Fisher <sfisher@panix.com>
Branch: master
Commit: c6056a744af028824797e769ddb71927740be88a

Add support to readelf for reading NetBSD ELF core notes.

binutils * binutils.c (process_netbsd_elf_note): New function.
	(process_note): Call the new function for NetBSD core notes.

include	* common.h (NT_NETBSD_MARCH): Define.