Changed variables in poky.ent to support building 1.5.1.
Added Manual revision entry to all manuals with that table for
the 1.5.1 release.
(From yocto-docs rev: a1c3196199437c3a7cfdf86e4f78b806c66b6385)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>