Add test to end of rwlock

src/xpdev/GNUmakefile

@@ -31,7 +31,7 @@ endif
 # Executable Build Rule
 $(WRAPTEST): $(MTOBJODIR)/wraptest.o $(DEPS)
 	@echo Linking $@
-	$(QUIET)$(CC) -o $@ $(LDFLAGS) $(MT_LDFLAGS) $^ $(XPDEV-MT_LIB_BUILD) -lm
+	$(QUIET)$(CC) -o $@ $(LDFLAGS) $(MT_LDFLAGS) $^ $(XPDEV-MT_LIB_BUILD) -lm $(XPDEV-MT_LIBS)
 
 $(XPTIME): $(OBJODIR)/xptime.o $(XPDEV_LIB_BUILD)
 	@echo Linking $@