[9] RFR (XS): 8073644: Assertion in LambdaFormEditor.bindArgumentType is too strict

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8073644/webrev.00
https://bugs.openjdk.java.net/browse/JDK-8073644

After JDK-8069591 [1] which introduced LambdaForm customization, the 
assert in LambdaFormEditor.bindArgumentType became too strict.

The fix is to relax it - compare uncustomized versions. And 
LambdaFormEditor.lambdaForm is always uncustomized.

Testing: java/lang/invoke, nashorn tests

Thanks!

Best regards,
Vladimir Ivanov

[1] https://bugs.openjdk.java.net/browse/JDK-8069591