jblas 1.2.4 includes native library support for PPC64LE.

Author: Matthew Brandyberry <mbrandy@us.ibm.com>

Closes #6199 from mtbrandy/jblas-1.2.4 and squashes the following commits:

9df9301 [Matthew Brandyberry] [BUILD] update jblas dependency version to 1.2.4