When cleaning, get rid of the binary from the filesystem area too.

package/strace/strace.mk

@@ -66,6 +66,7 @@ endif
 strace: uclibc $(TARGET_DIR)/usr/bin/strace 
 
 strace-clean: 
+	rm -f $(TARGET_DIR)/usr/bin/strace
 	$(MAKE) -C $(STRACE_DIR) clean
 
 strace-dirclean: