Remove unecessary %attr macros in RPM
Remove unecessary %attr macros in RPM

The file and directory modes already come through from the `install -m`
commands in %install. It's standard convention to omit these from %files,
for simplicity.

yangchengjian/riak,amyvmiwei/riak,GabrielNicolasAvellaneda/riak,laurenrother/riak,xuejianhai/riak,authbox-lib/riak,basho/riak,glickbot/riak,elkingtonmcb/riak,biddyweb/riak,DavidAlphaFox/riak