waf: add workaround for PE linker not removing unused methods

Tools/ardupilotwaf/ardupilotwaf.py

@@ -93,7 +93,15 @@ def ap_get_all_libraries(bld):
 
 @conf
 def ap_common_vehicle_libraries(bld):
-    return COMMON_VEHICLE_DEPENDENT_LIBRARIES
+    libraries = COMMON_VEHICLE_DEPENDENT_LIBRARIES
+
+    if bld.env.DEST_BINFMT == 'pe':
+        libraries += [
+            'AP_Proximity',
+            'AC_Fence',
+        ]
+
+    return libraries
 
 _grouped_programs = {}