make: pie -- Explicitly cleanup specific targets

make engine will be reworked to clean up only those
files which were generated with implicit rules. Thus
anything generated in specific way must be cleaned
up explicitly.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pie/Makefile

@@ -50,6 +50,8 @@ _all += $(BLOBS)
 cleanup-y += $(obj)/$(PIELDS)
 cleanup-y += $(obj)/*.bin
 cleanup-y += $(BLOBS)
+cleanup-y += $(obj)/*.built-in.bin.o
+cleanup-y += $(obj)/*.built-in.bin
 
 ifneq ($(MAKECMDGOALS),clean)
 incdeps := y