issue-446: Fixes compatability issues in malloc_hook_test for PPC64
issue-446: Fixes compatability issues in malloc_hook_test for PPC64

jamesgolick/gperftools,jamesgolick/gperftools,eixie/gperftools,eixie/gperftools,eixie/gperftools,jamesgolick/gperftools,eixie/gperftools,jamesgolick/gperftools