Enable test cases for: shll #imm, shrn #imm, rshrn #imm,
{smlal,umlal,smlsl,umlsl,smull,umull} (elem)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14148 a5019735-40e9-0310-863c-91ae7b9d1cf9