Add new MISC vector Iops to memcheck/tests/vbit-test/irops.c.

memcheck/tests/vbit-test fails with unknown opcode after introduction
of new Iops for AVX2, BMI, FMA support #317506

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13347 a5019735-40e9-0310-863c-91ae7b9d1cf9
memcheck/tests/strchr test should not depend on line numbers.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13348 a5019735-40e9-0310-863c-91ae7b9d1cf9
For memcheck overlap filter_memcpy str[n]cpy and __GI_str[n]cpy are equal.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13349 a5019735-40e9-0310-863c-91ae7b9d1cf9