Add ud2 to text-based validator spec.
Add ud2 to text-based validator spec.

nacl-objdump prints ud2 as 'ud2a', while regular objdump (which our decoder is based on) prints 'ud2'

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3453
TEST= ./scons dfacheckvalidator
R=khim@chromium.org

Review URL: https://codereview.chromium.org/18922003

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11736 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client