Swift PyEClib build requires 'make'

PyEClib was introduced recently to swift-master. It tries
to build liberasurecode which requires the `make` binary.

Change-Id: I8acfed4f7b46a29eac36f6acbe1d66e7fff800db
diff --git a/files/debs/swift b/files/debs/swift
index b32b439..0089d27 100644
--- a/files/debs/swift
+++ b/files/debs/swift
@@ -1,4 +1,5 @@
 curl
+make
 memcached
 # NOTE python-nose only exists because of swift functional job, we should probably
 # figure out a more consistent way of installing this from test-requirements.txt instead