RFR: JDK-8150497: 32 jshell tests failed on Windows 32 bit

[Erik Joelsson]

Here is some more fallout from [1]. The same kind of issue as in [2], 
but this time in jdi libs. The fix is to restore the -export link flags 
and remove the then redundant JNIEXPORT annotations in the code. I have 
verified that this fixes the tests in question.

Bug: https://bugs.openjdk.java.net/browse/JDK-8150497
Webrev: http://cr.openjdk.java.net/~erikj/8150497/webrev.jdk.01/index.html


[1] JDK-8150203 
<https://bugs.openjdk.java.net/browse/JDK-8150203>Incremental update 
from build-infra project
[2] JDK-8150456 <https://bugs.openjdk.java.net/browse/JDK-8150456>jdk 9 
nightly build fails on Windows 32 bit