preparation for 8.0-RELEASE.  Add the previous version of those
libraries to ObsoleteFiles.inc and bump __FreeBSD_Version.

Reviewed by:    kib
Approved by:    re (rwatson)

libraries had not had their versions bumped relative to 6.3-REL but
had indeed been changed.  We need to bump their version so they can be
properly added to the compat6x port:

	libasn1.so.8 libgssapi.so.8 libhdb.so.8 libkadm5clnt.so.8
	libkadm5srv.so.8 libkafs5.so.8 libkrb5.so.8 libobjc.so.2

MFC After:	1 day

  we did not install. Install objc-decls.h to fix.

PR:		116943
Reported by:	beech
Submitted by:	vanilla on -current, kan
MFC after:	1 week

Also:
        Switch FreeBSD to use libgcc_s.so.1.

        Use dl_iterate_phdr to locate shared objects' exception frame
        info instead of depending on older register_frame_info machinery.
        This allows us to avoid depending on libgcc_s.so.1 in binaries
        that do not use exception handling directly. As an additional
        benefit it breaks circular libc <=> libgcc_s.so.1 dependency too.

        Build newly added libgomp.so.1 library, the runtime support
        bits for OpenMP.

        Build LGPLed libssp library. Our libc provides our own
        BSD-licensed SSP callbacks implementation, so this library
        is only built to benefit applications that have hadcoded
        knowledge of libssp.so and libssp_nonshared.a. When linked
        in from command line, these libraries override libc
        implementation.

this library build repeatably.  (This change was made to libstdc++
several months ago; I just realized today that it would help here as
well.)

Approved by:	kan

been bumped since RELENG_5.

Reviewed by:	ru
Approved by:	re (not needed for commit check but in principle...)

in 1996.