Yet another step on the long road towards getting rid of lldb's Stream class.
We probably should just make this some kind of member of Address/AddressRange, but it seems quite often we just push
in random integers in there and this is just about getting rid of Stream and not improving arbitrary APIs.
I had to rename another DumpAddress function in FormatEntity that is dumping the content of an address to make Clang happy.
The "formatv" way of doing this would be via something like formatv("{0}0x{1:x}{2}", prefix, fmt_align(addr, AlignStyle::Right, addr_size*2, '0'), suffix), but that's quite a mouthful so I'd probably go for just s << prefix << format_hex(addr, 2+2*addr_size) << suffix;