tools: add missing updater unit-tests

Add missing updater unit-tests to prevent regressions moving forward in
development.

Change-Id: I33c8052fc62cd645059bcba6c5111063e4348e0c
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/Makefile.am b/test/Makefile.am
index f6a9263..a85285a 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -27,7 +27,8 @@
 	firmware_sessionstat_unittest \
 	firmware_commit_unittest \
 	file_handler_unittest \
-	tools_blob_unittest
+	tools_blob_unittest \
+	tools_updater_unittest
 
 TESTS = $(check_PROGRAMS)
 
@@ -69,3 +70,6 @@
 
 tools_blob_unittest_SOURCES = tools_blob_unittest.cpp
 tools_blob_unittest_LDADD = $(top_builddir)/tools/blob_handler.o
+
+tools_updater_unittest_SOURCES = tools_updater_unittest.cpp
+tools_updater_unittest_LDADD = $(top_builddir)/tools/updater.o