build: ignore another gnulib artifact

* .gitignore: Add lib/warn-on-use.h.

diff --git a/.gitignore b/.gitignore
index 3075883844cf2f3d78407442e082c13c42294800..15aef4f7af5cce256f5b1a23248be3aae46c833c 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -60,6 +60,7 @@ lib/selinux
 lib/unistr
 lib/uniwidth
 lib/unused-parameter.h
+lib/warn-on-use.h
 m4/.cvsignore
 m4/.gitignore
 maint.mk