Revert "removed exception handler for SYSCALL, causing an infinite loop after calling vAHI_SwReset()"
Revert "removed exception handler for SYSCALL, causing an infinite loop after calling vAHI_SwReset()"

This reverts commit c4def60cdd02760bed023bf516ddbbf89e2bd916.

MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,arurke/contiki,arurke/contiki,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,arurke/contiki