add comments

lib/omnibus/packagers/deb.rb

@@ -407,6 +407,9 @@ module Omnibus
           'armv6l'
         end
       when 'ppc64le'
+        # Debian prefers to use ppc64el for little endian architecture name 
+        # where as others like gnutools/rhel use ppc64le( note the last 2 chars)
+        # see http://linux.debian.ports.powerpc.narkive.com/8eeWSBtZ/switching-ppc64el-port-name-to-ppc64le
         'ppc64el'  #dpkg --print-architecture = ppc64el
       else
         Ohai['kernel']['machine']