PIG-3142: [piggybank] Fixed-width load and store functions for the Piggybank (jpacker via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1451783 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/pig into trunk