Update m4

[metaproxy-moved-to-github.git] / m4

diff --git a/m4 b/m4
index 1fa0b45..f81bbcf 160000 (submodule)
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit 1fa0b45a8141955801938f967f1d1dca1b042c17
+Subproject commit f81bbcfdb7c00a52929c10a528c2f8f7a2a3acec