RFR: JDK 9: 8143879 jdk/internal/jimage/JImageReadTest.java crashes jvm in msvcr120.dll

[Roger Riggs]

Please review a fix for jimage native code to correctly maintain the 
list of ImageFileReaders.

Issue:
    https://bugs.openjdk.java.net/browse/JDK-8143879

Webrev:
    http://cr.openjdk.java.net/~rriggs/webrev-jimage-read-8143879/

(It appears Jake has the same bugs but that's a separate issue/fix).

And its not clear why it fails on Windows mostly; but the malloc algorithm
may be sufficiently different on Linux to avoid the reuse.

Thanks, Roger