shill: Add nsswitch.conf to shill's repo.

Currently this file is generated on the fly by the flimflam
ebuild. Instead, we add it here and a subsequent CL will install it
from the shill ebuild.

BUG=chromium-os:24980
TEST=compare this file to the currently installed one

Change-Id: I067940ed2963bcfe1de336ace51c8922c7ad1d46
Reviewed-on: https://gerrit.chromium.org/gerrit/36543
Tested-by: Darin Petkov <petkov@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Ready: Darin Petkov <petkov@chromium.org>
diff --git a/shims/nsswitch.conf b/shims/nsswitch.conf
new file mode 100644
index 0000000..21fae73
--- /dev/null
+++ b/shims/nsswitch.conf
@@ -0,0 +1 @@
+hosts: files dns