build: update gnulib to latest for strtod and icc fixes

diff --git a/gnulib b/gnulib
index 37b74cd909f60076a096ab8ac2635bc77755153f..4baf5c1e594a65a315fbd5094eaeeb11f4630d18 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 37b74cd909f60076a096ab8ac2635bc77755153f
+Subproject commit 4baf5c1e594a65a315fbd5094eaeeb11f4630d18