build: update gnulib submodule to latest

diff --git a/gnulib b/gnulib
index bb3fd10e6309f017618a12b2c10d3bfb813bfc08..7352d9fec59398c76c3bb8a2ef86ba58818f0342 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit bb3fd10e6309f017618a12b2c10d3bfb813bfc08
+Subproject commit 7352d9fec59398c76c3bb8a2ef86ba58818f0342