* adds support for mgba printf debugging as well as adding support for switching between debugging configuration
* adds `mini_printf` as an alternative to libc printf as well as switches to choose a pretty printing handler
* adds a pretty printing format to `mini_printf` to print preproc encoded strings
Previously, aggressive loop optimizations with a new compiler were not
possible due to undefined behaviour at end of arrays.
A macro "UBFIX" is added to allow ifdefs for fixes which resolve
undefined behavior. For example newer GCC versions will detect various
bugs in the original game code and will otherwise not compile with -Werror.
sbird