AArch64/ARM64: copy support for bCC instead of b.CC across.
AArch64/ARM64: allow smaller granule relocations on MOVZ/MOVN

Testing will be enabled shortly with basic-a64-instructions.s
ARM64: use 32-bit operations for uxtb & uxth

Testing will be enabled shortly with basic-a64-instructions.s
ARM64: print lsr instead of lsrv for variable shifts (etc)

The canonical syntax for shifts by a variable amount does not end with 'v', but
that syntax should be supported as an alias (presumably for legacy reasons).
ARM64: enable AArch64's basic-a64-instructions test