8148147: Sync up @modules from jigsaw/jake
Reviewed-by: chegar, mchung

8060717: [TESTBUG] Improve test coverage of MethodHandles.explicitCastArguments()
Reviewed-by: vlivanov, mhaupt

8066746: MHs.explicitCastArguments does incorrect type checks for VarargsCollector
Reviewed-by: jrose, psandoz

8060483: NPE with explicitCastArguments unboxing null
Reviewed-by: attila, lagergren