Fix unittest cleanup

-Fix NVM test cleanup
-Remove test results from the top level

Author: Arto Kinnunen

Makefile

@@ -65,6 +65,7 @@ $(TESTDIRS):
 
 $(CLEANTESTDIRS):
 	@make -C $(@:clean-%=%) clean
+	@rm -fr results
 
 .PHONY: release
 release:

test/nanostack/unittest/thread/nvm/Makefile

@@ -17,19 +17,13 @@ TEST_SRC_FILES = \
 
 include ../../MakefileWorker.mk
 
-CLEAN-DIRS := $(foreach dir,$(DIRS),clean-$(dir))
-clean: $(CLEAN-DIRS)
-	rm -rf stub/*gcov stub/*gcda stubs/*o
-	rm -rf results/*
-	rm -rf coverages/*
-	rm -rf results
-	rm -rf coverages
-	rm -rf lib/*
-	rm -rf objs/*
-	rm -f /tmp/fd.txt
+clean:
+	rm -f f_d
+	rm -f s_d
+	rm -f cpputest_thread_nvm_store.xml
+	rm -f thread_nvm_store_unit_tests
+	rm -f thread_nvm_store_unit_tests
+	rm -f thread_nvm_store_unit_tests.txt
 
-.PHONY: $(CLEAN-DIRS)
-$(CLEAN-DIRS):
-	make -C $(subst clean-,,$@) clean	
+CPPUTESTFLAGS += -DFEA_TRACE_SUPPORT -DHAVE_THREAD
 
-CPPUTESTFLAGS += -DFEA_TRACE_SUPPORT -DHAVE_THREAD=1