Update doc/common and m4

diff --git a/doc/common b/doc/common
index 5d3fcb2..cc59b50 160000 (submodule)
--- a/doc/common
+++ b/doc/common
@@ -1 +1 @@
-Subproject commit 5d3fcb2cd2ef1cf9c5c5b40ef5c5353913b56b4f
+Subproject commit cc59b50a147656750bff1385f50fd6ad656d77e4

diff --git a/m4 b/m4
index 9d331ef..eda6995 160000 (submodule)
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit 9d331ef6b322bc17ffcd4c04728cc39b0b317e13
+Subproject commit eda6995523f2412995ee60b5fe6443dee3e0d156