Update gnulib

diff --git a/gnulib b/gnulib
index 624ea2886cc570788cb01c4fd59315de301b0cd6..e5a15adc6db466ae9d7ea5d892f78e0390d032d0 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 624ea2886cc570788cb01c4fd59315de301b0cd6
+Subproject commit e5a15adc6db466ae9d7ea5d892f78e0390d032d0