Support aarch64eb in */config.guess.

Cherry-picked from upstream:
https://git.savannah.gnu.org/gitweb/?p=config.git;a=commit;h=1c4398015583eb77bc043234f5734be055e64bea

Everything except external/apache2/llvm/dist/llvm/cmake/config.guess
is patched, which is under vendor tag and cannot be modified. I expect
that this file is not actually used as we use hand-crafted version of
configure script instead of cmake for building LLVM.

Note that external/apache2/llvm/autoconf/autoconf/config.guess has
already been committed on Oct. 20, but commit message disappeared as
cvs aborted due to "permission denied" when trying to modify the file
mentioned above. Sorry for confusing you.

Also note that GMP uses its own config.guess Patch for
external/lgpl3/gmp/dist/config.guess is provided by ryo@. Thanks!

Update supporting files for components which rely on autoconf to allow systems
introducing since release of software to be recognised. This should hopefully
allow the builds to progress a littles further on systems such as the POWER8
which features a little endian 64-bit PowerPC CPU identified as ppc64le.

branches: 1.1.30; 1.1.34;
Update the external tree for new structure for reachover builds.

Add some iscsi-specific changes too:

Portable iSCSI - 20080207 to 20090622

+ Use modern autoconf
+ Add portable iSCSI initiator sources
+ New directory structure
+ Put OSD sources in their own directory
+ iscsi.h -> iscsiprotocol.h
+ add an iscsi.h for the new interface, and install it
+ globals_t -> iscsi_target_t
+ made an iscsi-target.h with all public functions in it
+ reformatted Intel license to fit in 80 columns
+ get rid of some abstractions which aren't needed any more
+ move over to a set of (name, value) tuples in target and initiator
+ add patch to set the target's StatSN at login time, from Gleb Kozyrev via
Mark Foster
+ add manual page for libiscsi(3)
+ update libiscsi shared object major version to 2 to reflect the changes
in API and ABI

More changes to come

Update supporting files for components which rely on autoconf to allow systems
introducing since release of software to be recognised. This should hopefully
allow the builds to progress a littles further on systems such as the POWER8
which features a little endian 64-bit PowerPC CPU identified as ppc64le.

Update the external tree for new structure for reachover builds.

Add some iscsi-specific changes too:

Portable iSCSI - 20080207 to 20090622

+ Use modern autoconf
+ Add portable iSCSI initiator sources
+ New directory structure
+ Put OSD sources in their own directory
+ iscsi.h -> iscsiprotocol.h
+ add an iscsi.h for the new interface, and install it
+ globals_t -> iscsi_target_t
+ made an iscsi-target.h with all public functions in it
+ reformatted Intel license to fit in 80 columns
+ get rid of some abstractions which aren't needed any more
+ move over to a set of (name, value) tuples in target and initiator
+ add patch to set the target's StatSN at login time, from Gleb Kozyrev via
Mark Foster
+ add manual page for libiscsi(3)
+ update libiscsi shared object major version to 2 to reflect the changes
in API and ABI

More changes to come

Update the external tree for new structure for reachover builds.

Add some iscsi-specific changes too:

Portable iSCSI - 20080207 to 20090622

+ Use modern autoconf
+ Add portable iSCSI initiator sources
+ New directory structure
+ Put OSD sources in their own directory
+ iscsi.h -> iscsiprotocol.h
+ add an iscsi.h for the new interface, and install it
+ globals_t -> iscsi_target_t
+ made an iscsi-target.h with all public functions in it
+ reformatted Intel license to fit in 80 columns
+ get rid of some abstractions which aren't needed any more
+ move over to a set of (name, value) tuples in target and initiator
+ add patch to set the target's StatSN at login time, from Gleb Kozyrev via
Mark Foster
+ add manual page for libiscsi(3)
+ update libiscsi shared object major version to 2 to reflect the changes
in API and ABI

More changes to come