Changes to base

Changes to base:
commit 0fc4fb5477d3ca22a8b6894db5b1112b9badfdc4
Author: Chris Dueck <crdueck@uwaterloo.ca>
Date:   Wed Feb 19 22:18:14 2014 +0100

    Use new bitwise Int# primops in Data.Bits (re #8791)

    The new primops (see also #7689) allow to optimize
    `instance Bits Int` by allowing to operate directly on Int#
    instead of having to convert to Word# and back to Int# again.

    Authored-by: Chris Dueck <crdueck@uwaterloo.ca>
    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>