Options for ARM disassembly syntax

[AetiasHax]

ARM assembly syntax differs between platforms and toolchains, so I've added a few options for the disassembly output:

• Unified syntax aka UAL (enabled by default)
• Display R0-R11 as A1-A4 (arguments) and V1-V8 (variables)
• Display R9 as SB (static base) or TR (TLS register)
• Display R10 as SL (stack limit)
• Display R11 as FP (frame pointer)
• Display R12 as IP (intra-procedure call scratch register)

[encounter]

Looks great, thank you!