build: update gnulib submodule to latest

diff --git a/gnulib b/gnulib
index 0cca364da074782231685f955da2f0ce67d8c155..5da32b6e05e27c71fd042ef10a4970b10862bc88 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 0cca364da074782231685f955da2f0ce67d8c155
+Subproject commit 5da32b6e05e27c71fd042ef10a4970b10862bc88