RFR: 8204476: Add additional statistics to CodeCache::print_summary

[René Schünemann]

Hi,

can I please get a review for the following change:

Bug: https://bugs.openjdk.java.net/browse/JDK-8204476
Webrev: http://cr.openjdk.java.net/~goetz/wr18/rene/webrev_8204476/01/

This change adds the following:

(1) In CodeCache::print_summary prints the code cache full count for
each code heap.

(2) Adds additional counters to class CompileBroker:
    _total_compiler_stopped_count: The number of times the compilation
has been stopped.
    _total_compiler_restarted_count: The number of times the
compilation has been restarted.
   This counters are also added to CodeCache::print_summary.


Thank you,
Rene