enable unit-tests

This CL simply enables unit-tests.

Change-Id: I4ea62005566e2aa42fc29258559654fe2745f726
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/Makefile.am b/Makefile.am
index b5d488f..ea2a963 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -70,4 +70,4 @@
 #                             $(PHOSPHOR_DBUS_INTERFACES_CFLAGS) \
 #                             $(PHOSPHOR_LOGGING_CFLAGS)
 
-SUBDIRS = .
+SUBDIRS = . test