AMD64: Add support for AVX2, BMI1, BMI2 and FMA instructions (VEX side).
Fixes #305728.  (Jakub Jelinek, jakub@redhat.com)



git-svn-id: svn://svn.valgrind.org/vex/trunk@2702 8f6e269a-dfd6-0310-a8e1-e2731360e62c