Bump up FVP model version to 11.12.38

Bumped up the model version to 11.12.38 as per the
latest release done by model team.

FVP model release versions are available in the below link:
https://connect.arm.com/browse/FM000-KT-00035

Change-Id: Ie175a02d80d1264bac344e259821850d09d795bc
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
1 file changed