Thumb encoding: add test cases for  misaligned loads of the form
   LD Rt, [Rn +/- #imm12]  when Rn == PC
See #333145.  (dimitry@google.com)



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13958 a5019735-40e9-0310-863c-91ae7b9d1cf9