RFR (12) JDK-8218025: disable pop_frame and force_early_return caps for Graal

[Alex Menkov]

Hi all,

Please review a fix for tck-red bug:
https://bugs.openjdk.java.net/browse/JDK-8218025
webrev:
http://cr.openjdk.java.net/~amenkov/tck_red_disable_caps/webrev/

ForceEarlyReturn and PopFrame JCK tests intermittently fail with Graal.
Real fix for the issue is too risky for jdk12, so we have to disable 
pop_frame and force_early_return capabilities running with Graal (the 
capabilities are optional).
Currently Graal is the only compiler, so the fix checks if JVMCI 
compiler is enabled.
JCK test passes with disabled capabilities.
A number of hotspot tests do not check if the capabilities are enabled 
(as hotspot is expected to support all capabilities) and fail with Graal 
- they are problem-listed until the real problem (JDK-8195635) is resolved.

--alex