Add comprehensive testing for almost all supported load/store instructions.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13850 a5019735-40e9-0310-863c-91ae7b9d1cf9
updated NEWS to state bug 329956 is fixed for the next release.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13851 a5019735-40e9-0310-863c-91ae7b9d1cf9