RFR: JDK-8044343 - Check jdk/src/windows/native/java/lang/ProcessEnvironment_md.c for JNI pending exceptions

[Mark Sheppard]

Hi,
    please oblige and review the following change
http://cr.openjdk.java.net/~msheppar/8044343/webrev/

which addresses issue
https://bugs.openjdk.java.net/browse/JDK-8044343

which is a backport of
https://bugs.openjdk.java.net/browse/JDK-8036603

the original changeset didn't apply cleanly and was applied manually
http://hg.openjdk.java.net/jdk9/dev/jdk/rev/323b64a9dede

regression tests ran ok

and finally please approve backport to jdk8u-dev

regards
Mark