Fix ssat and ssat16 encodings for ARM and Thumb. The bit position value must be encoded decremented by one. Only add encoding tests for ssat16 because ssat can't be parsed yet.
Fix ssat and ssat16 encodings for ARM and Thumb. The bit position value
must be encoded decremented by one. Only add encoding tests for ssat16
because ssat can't be parsed yet.

git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@132324 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx