Add test cases for LDRHT (Thumb), LDRSHT (Thumb), [LDR,ST]{S}[B,H]T (ARM).
Pertains to 321891, 323035, 324047.  (vasily.golubev@gmail.com)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13583 a5019735-40e9-0310-863c-91ae7b9d1cf9