add memprotect calls to event log

The current event log holds the last n events of various interesting operations.
It is printed in the hs_err file and helps to analyze various issues / bugs .
I would like to add memory protection events to the current set of events added by calling Events::log ; those cover the memprotect calls on the UNIX platforms.
Example :

Events (20 events):
 ....
Event: 10.972 Protecting memory [0x000003ff840f6000,0x000003ff840f7000] with protection modes 7