l2: add api test file

Type: improvement

Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Change-Id: Ie79a2deac03c04c0697e482a649ff151142126ed
diff --git a/src/vnet/CMakeLists.txt b/src/vnet/CMakeLists.txt
index 14b1e4c..e463f2c 100644
--- a/src/vnet/CMakeLists.txt
+++ b/src/vnet/CMakeLists.txt
@@ -1528,6 +1528,7 @@
   ip6-nd/ip6_nd_test.c
   srmpls/sr_mpls_test.c
   session/session_test.c
+  l2/l2_test.c
 )
 
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