RFR: JDK-8029007, Check src/share/native/sun/misc code for JNI pending exceptions

[Dan Xu]

Hi All,

Please review the fix for JNI pending exception issues reported in 
jdk-8029007. Thanks!

Webrev: http://cr.openjdk.java.net/~dxu/8029007/webrev.00/
Bug: https://bugs.openjdk.java.net/browse/JDK-8029007

-Dan