filters: Add propertiesChangedTo

Add a signal match filter for properties changing to a specific
value.

Change-Id: I10f20ba03ae7c629d2c338c7975e0d32d9008e01
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/test/Makefile.am b/test/Makefile.am
index 4026307..2c340ea 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -5,4 +5,5 @@
 phosphor_inventory_test_LDFLAGS = $(SYSTEMD_LIBS)
 phosphor_inventory_test_CFLAGS = $(SYSTEMD_CFLAGS)
 phosphor_inventory_test_LDADD = ${top_builddir}/manager.o \
+				${top_builddir}/filters.o \
 				${top_builddir}/server.o