RFR 8233389: Add PrintIdeal to compiler directives

[Jorn Vernee]

Hi,

I'd like to add PrintIdeal as a compiler directive in order to enable 
PrintIdeal for only a single method when combining it with the 'match' 
directive.

Please review the following:

Bug: https://bugs.openjdk.java.net/browse/JDK-8233389
Webrev: http://cr.openjdk.java.net/~jvernee/print_ideal/webrev.00/
(Testing = tier1, manual)

As a heads-up; I'm not a committer on the jdk project, so if this sounds 
like a good idea, I would require a sponsor to push the changes.

Thanks,
Jorn