Build libmemif as part of verify job

Change-Id: I7e808b5bcbb74343a4ed6782f115ed07e9bfe3a6
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
diff --git a/build-data/packages/extras.mk b/build-data/packages/extras.mk
new file mode 100644
index 0000000..fa81ada
--- /dev/null
+++ b/build-data/packages/extras.mk
@@ -0,0 +1 @@
+# empty file