Add Sensor.Value server bindings

Temporarily add the server bindings for xyz.openbmc_project.Sensor.Value
until they are available elsewhere.

Change-Id: Ic04b88e4ef08308ce57732eca74407d5248050cf
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/Makefile.am b/Makefile.am
index d93b6da..6325121 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,6 +10,7 @@
 	argument.cpp \
 	directory.cpp \
 	sensorset.cpp \
-	mainloop.cpp
+	mainloop.cpp \
+	xyz.openbmc_project.Sensor.Value.cpp
 
 SUBDIRS = . test