cras: allow ebuild to handle autotools+configure
cras: allow ebuild to handle autotools+configure

The ebuild should take care of running autotools and executing configure
so that all the right paths get passed.  Otherwise, we don't apply the
necessary cross-compile fixes or install into the right place.

BUG=chromium-os:20636
TEST=`emerge-x86-alex adhd` installs same set of files

Change-Id: I8a9cb0ee7bd54b36c9bb71098d38b10b152d79b6
Signed-off-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd,drinkcat/adhd