Add support for ARMv8 AArch64 (the 64 bit ARM instruction set):
integer and FP instructions.



git-svn-id: svn://svn.valgrind.org/vex/trunk@2803 8f6e269a-dfd6-0310-a8e1-e2731360e62c
Add missing ULLs to some 64-bit immediates.


git-svn-id: svn://svn.valgrind.org/vex/trunk@2804 8f6e269a-dfd6-0310-a8e1-e2731360e62c