[JFR: jdk8u-jfr-incubator] RFR: JDK-8239479: minimal1 and zero builds are failing

[Andrey Petushkov]

Hi All,

could you please review small patch which aims to disable build of JFR
when user
requested minimal1 or zero build of VM. JFR code is incompatible with
minimal and zero VMs
and the proposed behavior is demonstrated by jdk11 implementation.
However because the jdk11
build system is completely different in this place I got to invent
jdk8-specific implementation.

webrev: https://cr.openjdk.java.net/~apetushkov/8239479/

bug: https://bugs.openjdk.java.net/browse/JDK-8239479

Thanks,
Andrey