[9] RFR: 8152207: Perform array bound checks while getting a length of bytecode instructions

[Artem Smotrakov]

Hello,

Please review two small patches for jdk and hotspot repos which add 
array bound checks to functions which return a length of bytecode 
instruction.

Please see details in https://bugs.openjdk.java.net/browse/JDK-8152207

http://cr.openjdk.java.net/~asmotrak/8152207/jdk/webrev.00/
http://cr.openjdk.java.net/~asmotrak/8152207/hotspot/webrev.00/

Artem