Request for backport approval: JDK-8059231

[Marcus Lagergren]

Very trivial changes to logger to clearly state whether optimistic types are enabled or not. Also - there was assymmetri in the log levels that print out the start and end job compiler jobs too. Here is the review thread:

http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-October/003586.html

Here is the webrev:

http://cr.openjdk.java.net/~lagergren/8059231/webrev/

Tagged with appropriate noreg label.

Here is the bug:  https://bugs.openjdk.java.net/browse/JDK-8059231

/M