Use a Makefile for the devserver instead of updating what we install each time.

BUG=None
TEST=Ran makefile using new ebuild.  Emerged build using gmerge protocol.
Also grepped through source tree to make sure I'm not changing any use.

Change-Id: I47f7fe3ad936fb350f480e537977a12eb1a8e046
Reviewed-on: https://gerrit.chromium.org/gerrit/19127
Commit-Ready: Chris Sosa <sosa@chromium.org>
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: Zdenek Behan <zbehan@chromium.org>
diff --git a/host/start_devserver b/host/start_devserver
index a0d3072..76e9b2a 100755
--- a/host/start_devserver
+++ b/host/start_devserver
@@ -34,4 +34,8 @@
 
 export DEFAULT_INSTALL_MASK
 
-python /usr/bin/devserver.py "$@"
+if [ -f /usr/lib/devserver/devserver.py ]; then
+  python /usr/lib/devserver/devserver.py "$@"
+else
+  python /usr/bin/devserver.py "$@"
+fi