[9] RFR (S) 8057654: Extract checks performed during MethodHandle construction into separate methods

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8057654/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8057654
The idea is to separate construction logic and different checks 
performed before/during method handle construction.

For example: move checks from MHs.foldArguments into MHs.foldArgumentChecks.

Testing: jdk/java/lang/invoke, jdk/java/util/streams, nashorn, octane w/ 
"-ea -esa" and COMPILE_THRESHOLD={0,30}.

Reviewed-by: vlivanov, ?
Contributed-by: john.r.r...@oracle.com

Thanks!

Best regards,
Vladimir Ivanov