The fix for 7134701 needs to be updated to make the same change for the other code paths where
native libraries are loaded: namely
- where non-bootstrap classloaders are used and
- where System.load() is called

In both those cases an absolute pathname is provided, but (on Mac) we should attempt to load the
original file first and on Mac, for compatibility with Apple's jdk 6, we should look for a .jnilib
variant if the original name was *.dylib, and it wasn't found.