Update m4

[pazpar2-moved-to-github.git] / m4

diff --git a/m4 b/m4
index 2ceb2c3..a68af87 160000 (submodule)
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit 2ceb2c3a4b580e09aadcbd1cbbb12e10b60f1337
+Subproject commit a68af871a42a363953e3ff78feff378787ad6ddd