* Fuzzing M68K without abort
* UC_MODE_32 is not ok with sparc
use UC_MODE_SPARC32|UC_MODE_BIG_ENDIAN instead
* Temporary removing leaking on start targets
* Do not abort for m68K undef instructions
Backports commit 12bcf3bea093ed733904d3993bbdba0c2572a497 from unicorn.