presence: Invoke pfpgen.py

Invoke the new parser during build.

Change-Id: I3a3c8c227a79e6f80a051c5e1d3a9a2b7f4e9656
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/presence/tach_detect.cpp b/presence/tach_detect.cpp
index 6284f89..6ec5a5c 100644
--- a/presence/tach_detect.cpp
+++ b/presence/tach_detect.cpp
@@ -17,6 +17,7 @@
 #include <vector>
 #include "fan_enclosure.hpp"
 #include "fan_detect_defs.hpp"
+#include "generated.hpp"
 #include "sdbusplus.hpp"
 #include "tach_sensor.hpp"