Update doc/common + 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 1fa0b45..f7d7eb4 160000 (submodule)
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit 1fa0b45a8141955801938f967f1d1dca1b042c17
+Subproject commit f7d7eb4b44b7fdad1942e32856d6afc2e6dcabda