Back to -O2

-Os breaks booting from flash

Customize version string in the Qoob SX updater

Use -Os and dolxz

Trim the last few bytes off to fit within the Qoob SX updater.

Most likely requires a custom dolxz build using clang and -Os.

Makefile: update clean rule

Unset FLAG_DISABLE_CHIP on Viper

Should fix IPL not booting at all

Update README.md

dol2gcb