release.sh: disable colors and the beastie menu for ARM/ARM64 targets

release.sh: disable colors and the beastie menu for ARM/ARM64 targets

lualoader has moved to a model where the user is expected to disable color
as desired, rather than disabling it automatically for serial boots, due to
more wide-spread support for color sequences.

In a similar vain, though also to reduce special cases, lualoader no
longer disables the beastie menu automatically for !x86. This was done in
Forth land with a different loader.rc that simply didn't invoke the menu
routines, thus wasn't necessary.

This set of changes puts release images back to how they would've been
experienced prior to the switch to Lua.

Approved by:	re (rgrimes)