Adds M68K to the supported architectures to allow set_arch() to do its job

Author: hugsy

archs/m68k.py

@@ -105,3 +105,5 @@ def get_ra(self, insn, frame):
     @classmethod
     def mprotect_asm(cls, addr, size, perm):
         raise NotImplementedError()
+
+SUPPORTED_ARCHITECTURES["M68K"] = (M68K, Elf.M68K: M68K)