build: fix 'make clean' issue
Remove Bourne shell expansion in command.
Make invokes /bin/sh, which is not necessarily bash, and
recongize bash sppecific syntax.
@@ -38,7 +38,7 @@ gotest: image
$(MAKE) -C $(subst -clean,,$@) clean
clean:
- $(MAKE) {contgen,boot,stage3,mkfs,examples,test}-clean
+ $(MAKE) $(addsuffix -clean,contgen boot stage3 mkfs examples test)
$(MAKE) -C gotests clean
$(Q) $(RM) -f $(FS) $(IMAGE) $(IMAGE).dup
$(Q) $(RM) -fd $(dir $(IMAGE)) output
