Read GPIO key on startup

Create class Presence which will be responsible for
determining and monitoring presence of inventory items
and updating D-Bus accordingly. With this commit
class Presence only reads the GPIO key on startup,
more to come later.

Change-Id: I647ae11d42a813a103e6d9d8922fd0f5b2155132
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/presence/Makefile.am b/presence/Makefile.am
index f66c0e7..8af030c 100644
--- a/presence/Makefile.am
+++ b/presence/Makefile.am
@@ -10,8 +10,12 @@
 	gpio_presence.cpp
 
 phosphor_gpio_presence_CXXFLAGS = \
-	$(PHOSPHOR_LOGGING_CFLAGS)
+	$(PHOSPHOR_LOGGING_CFLAGS) \
+	$(PHOSPHOR_DBUS_INTERFACES_CFLAGS) \
+	$(LIBEVDEV_CFLAGS)
 
 phosphor_gpio_presence_LDADD = \
-	$(PHOSPHOR_LOGGING_LIBS)
+	$(PHOSPHOR_LOGGING_LIBS) \
+	$(PHOSPHOR_DBUS_INTERFACES_LIBS) \
+	$(LIBEVDEV_LIBS)