Please review: To enable native code checking consistently for thrown exceptions, the macros in net_util.h and java/util/jar/pack/coding.cpp are made consolidated and promoted to jni_util.h
webrev: http://cr.openjdk.java.net/~rriggs/webrev-check-exception-8030875/ [1] https://bugs.openjdk.java.net/browse/JDK-8030875
