[9] RFR: Static build of libzip is missing JNI_OnLoad_zip entry point

[Naoto Sato]

Hello,

The previous attempt to fix this one failed in the installer build, as 
it does not recognize the added macro. I've updated the fix to add extra 
check for static build (yeah, this is redundant with the real 
jni_util.h, but effectively avoid the installer build failure).

http://cr.openjdk.java.net/~naoto/8150179/webrev.01/

Please review.

Naoto