Remove elf2e32 and other mmp references which eclipse the binaries_prebuilt versions from sftools/dev/build NB. transasm should go as well, but the prebuilt binaries don't have the GCC_SURGE fix yet.

Made by JonC 14/05/01

Introduction of emulator_launcher component for the 6.1 SDKs i.e. these are the stub launchers
that were present on the 6.0 SDKs, together with a new launcher for pepoc.