Abort on panic
Abort on panic

Currently we exit cleanly in mill_panic, loosing all state. Replace
exit() with abort(), creating a helpful core dump.

Signed-off-by: Nir Soffer <60258c486a9660a474d408e6013543d2add80a76@redhat.com>

lsm/libmill,reqshark/libmill,dailypips/libmill,lsm/libmill,dailypips/libmill,dailypips/libmill,reqshark/libmill,linearregression/libmill,linearregression/libmill,ebfe/libmill,8l/libmill,ebfe/libmill,sustrik/libmill,nirs/libmill,jimjag/mill,lsm/libmill,nirs/libmill,sustrik/libmill,ebfe/libmill,jimjag/mill,sustrik/libmill,jimjag/mill,reqshark/libmill,linearregression/libmill,8l/libmill