Update change-log for the 1.0.0-beta release

Extend the change log to cover v1.0.0-beta.

Change-Id: Ifb48a8a3855c2451c2ae5c2d572a9911bb9dcd00
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
1 file changed