tools: add missing io handler unittests

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I78dfb794969fc8b34bdd9093745bc625581069dd
diff --git a/tools/test/Makefile.am b/tools/test/Makefile.am
index 16c1bb3..e49ef22 100644
--- a/tools/test/Makefile.am
+++ b/tools/test/Makefile.am
@@ -21,7 +21,8 @@
 	tools_pci_unittest \
 	tools_net_unittest \
 	tools_updater_unittest \
-	tools_helper_unittest
+	tools_helper_unittest \
+	io_unittest
 
 TESTS = $(check_PROGRAMS)
 
@@ -42,3 +43,6 @@
 
 tools_helper_unittest_SOURCES = tools_helper_unittest.cpp
 tools_helper_unittest_LDADD = $(top_builddir)/tools/libupdater.la
+
+io_unittest_SOURCES = io_unittest.cpp
+io_unittest_LDADD = $(top_builddir)/tools/libupdater.la