Fix ‘make clean’ with a file named ‘-.o’

Problem reported by T.V Raman in:
https://lists.gnu.org/r/emacs-devel/2018-09/msg00866.html
* Makefile.in (clean, extraclean):
* doc/emacs/Makefile.in (mostlyclean):
* doc/lispintro/Makefile.in (mostlyclean):
* doc/lispref/Makefile.in (mostlyclean):
* doc/misc/Makefile.in (mostlyclean, clean):
* etc/refcards/Makefile (clean):
* lib-src/Makefile.in (mostlyclean, extraclean):
* lib/Makefile.in (clean):
* lwlib/Makefile.in (clean mostlyclean):
* oldXMenu/Makefile.in (clean mostlyclean):
* src/Makefile.in (mostlyclean, extraclean):
* test/Makefile.in (mostlyclean):
Say ‘rm ./*.o’ instead of ‘rm *.o’ to avoid undesirable failure
when a file name begins with ‘-’.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Makefile.in b/lib/Makefile.in
index b26db27423d..7dba31be711 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -118,7 +118,7 @@ TAGS: $(ETAGS) $(tagsfiles)
 .PHONY: $(ETAGS) tags
 
 clean:
-        rm -f *.[ao] *-t \#* $(DEPDIR)/*
+        rm -f ./*.[ao] ./*-t \#* $(DEPDIR)/*
 mostlyclean: clean
         rm -f $(filter-out %-t,$(MOSTLYCLEANFILES))
 distclean bootstrap-clean: mostlyclean