GXemul Code2

Implementing the ARM mls instruction.

It seems that Linux/Android wants 0xffffffff as the architecture ID for some machines.

Implementing ARM ldrex/strex (load-linked / store-conditional).

Beginning on a hack to allow emulated SGI O2 machines have more than 256 MB of RAM. Works with OpenBSD/sgi so far.

Skip the cast align warnings for now. Perhaps there is time in the future to revisit this.

Fix minor warnings.

Fix size_t vs int warning.

Fixing potential compiler warning/error.

Disassembly of the "mls" ARM instruction, and minor debug updates.

Some more debug register values, just in case.