test-exe.mk: Add target testclean, fix dependencies

- Add target testclean
  - Beautify output
  - Fix dependencies

make/test-exe.mk

@@ -7,19 +7,16 @@ ifeq ($(EXE),)
 EXE = $(notdir $(shell pwd))
 endif
 
-include $(MODDIR)/make/defs.mk
-include $(MODDIR)/make/ldlibpath.mk
 include $(MODDIR)/make/exe.mk
 
-all: test.done
-clean: test-out-clean
+test: test.done
+clean: testclean
 
 test.done:
 	if ! 2>&1 make run > test.out 2>&1 ; then \
-		echo "================= test failed"; \
 		cat test.out; \
 	fi
 	touch $@
 
-test-out-clean:
+testclean:
 	rm -rf test.done test.out