zdtm: make -- Add -f key on clean* ops

Otherwise if no such files present I'm getting warnings.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/lib/Makefile

@@ -18,10 +18,10 @@ install: all
 $(LIB):	$(LIB)(${LIBOBJ})
 
 clean:
-	$(RM) $(LIBOBJ) $(LIB) *~
+	$(RM) -f $(LIBOBJ) $(LIB) *~
 
 cleandep:
-	$(RM) $(LIBDEP)
+	$(RM) -f $(LIBDEP)
 
 realclean:	clean cleandep
 

test/zdtm/live/static/Makefile

@@ -228,16 +228,16 @@ $(LIB):	force
 	$(MAKE) -C $(LIBDIR)
 
 clean:
-	$(RM) $(OBJ) $(TST) *~
+	$(RM) -f $(OBJ) $(TST) *~
 
 cleandep:	clean
-	$(RM) $(DEP)
+	$(RM) -f $(DEP)
 
 cleanout:
-	$(RM) -r *.pid *.out* *.test* *.state
+	$(RM) -f -r *.pid *.out* *.test* *.state
 
 %.cleanout: %
-	$(RM) -r $<.pid $<.out* $<.test* $<.*.test $<.state
+	$(RM) -f -r $<.pid $<.out* $<.test* $<.*.test $<.state
 
 realclean:	cleandep cleanout
 

test/zdtm/live/streaming/Makefile

@@ -69,16 +69,16 @@ $(LIB):	force
 	$(MAKE) -C $(LIBDIR)
 
 clean:
-	$(RM) $(OBJ) $(TST) *~
+	$(RM) -f $(OBJ) $(TST) *~
 
 cleandep:	clean
-	$(RM) $(DEP)
+	$(RM) -f $(DEP)
 
 %.cleanout: %
-	$(RM) -r $<.pid $<.out* $<.test
+	$(RM) -f -r $<.pid $<.out* $<.test
 
 cleanout:
-	$(RM) *.pid *.out* *.test*
+	$(RM) -f *.pid *.out* *.test*
 
 realclean:	cleandep cleanout
 

test/zdtm/live/transition/Makefile

@@ -68,16 +68,16 @@ $(LIB):	force
 	$(MAKE) -C $(LIBDIR)
 
 clean:
-	$(RM) $(OBJ) $(TST) *~
+	$(RM) -f $(OBJ) $(TST) *~
 
 cleandep:	clean
-	$(RM) $(DEP)
+	$(RM) -f $(DEP)
 
 %.cleanout: %
-	$(RM) -r $<.pid $<.out* $<.test
+	$(RM) -f -r $<.pid $<.out* $<.test
 
 cleanout:
-	$(RM) *.pid *.out* *.test chew*
+	$(RM) -f *.pid *.out* *.test chew*
 
 realclean:	cleandep cleanout