RFR 8152065: TraceBytecodes breaks the interpreter expression stack

[Coleen Phillimore]

Summary: Move trace_bytecode to InterpreterRuntime and make 
trace_bytecode an IRT_LEAF so that safepoints are not allowed.

open webrev at http://cr.openjdk.java.net/~coleenp/8152065.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8152065

Tested with test program for bug 
https://bugs.openjdk.java.net/browse/JDK-8151256 and runThese with 
-XX:+TraceBytecodes for a few minutes (output file got too big).

Thanks,
Coleen