Add test-cases for Power ISA 2.06 insns: divdo/divdo. and divduo/divduo.

The patch was supplied by Anmol P. Paralkar.

Valgrind Bugzilla 325110


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13574 a5019735-40e9-0310-863c-91ae7b9d1cf9