JDK 7u381 Bug Fixes

The following table lists the bug fixes included in the JDK 7u381 release:

# JBS Component/Subcomponent Summary
1JDK-8296496client-libs/java.awtOverzealous check in sizecalc.h prevents large memory allocation
2JDK-8295685client-libs/java.awtUpdate Libpng to 1.6.38
3JDK-8272985hotspot/gcReference discovery is confused about atomicity and degree of parallelism
4JDK-8197859hotspot/runtimeVS2017 Complains about UINTPTR_MAX definition in globalDefinitions_VisCPP.hpp