[jhbuild] bootstrap: add patch to m4 to fix trap abort 6 error

[Ignacio Casal Quinteiro <icq src gnome org>]

commit e7c9767c393592a795cc1dc7f26a74d06c8c5516
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Tue Oct 2 00:04:12 2018 +0200

    bootstrap: add patch to m4 to fix trap abort 6 error
    
    This patch is needed for new osx versions

 modulesets/bootstrap.modules | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/modulesets/bootstrap.modules b/modulesets/bootstrap.modules
index f5af004c..a833a0d3 100644
--- a/modulesets/bootstrap.modules
+++ b/modulesets/bootstrap.modules
@@ -48,9 +48,11 @@
 
   <autotools id="m4" autogen-sh="configure" bootstrap="true">
     <branch repo="ftp.gnu.org"
-           module="m4/m4-${version}.tar.xz" version="1.4.18"
-           size="1207688"
-            hash="sha256:f2c1e86ca0a404ff281631bdc8377638992744b175afb806e25871a24a934e07" />
+            module="m4/m4-${version}.tar.xz" version="1.4.18"
+            size="1207688"
+            hash="sha256:f2c1e86ca0a404ff281631bdc8377638992744b175afb806e25871a24a934e07">
+      <patch 
file="https://raw.githubusercontent.com/macports/macports-ports/edf0ee1e2cf/devel/m4/files/secure_snprintf.patch";
 strip="0"/>
+    </branch>
   </autotools>
 
   <autotools id="autoconf" autogen-sh="configure" bootstrap="true">