maint: use announce-gen's new --mail-headers.

[bison.git] / gnulib

diff --git a/gnulib b/gnulib
index 1778ee9e7d0e150a37db66a0e51c1a56755aab4f..b48afd89ec9be56156d6e2bebfdf457c778fe5c3 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 1778ee9e7d0e150a37db66a0e51c1a56755aab4f
+Subproject commit b48afd89ec9be56156d6e2bebfdf457c778fe5c3