Fixes [YOCTO #4958]
Added a bullet item to the packages section in the migration chapter
for upgrading to YP v1.6. Item notes the issue and warns the
user to beware.
(From yocto-docs rev: f66ca39a65c2529ebc552d3a816e6565dae183f7)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>