[gtk-osx] Tell Flex not to build libfl

[John Ralls <jralls src gnome org>]

commit 4f1624f88d30ae4ea66d7561eaabc1278d308e3d
Author: John Ralls <jralls ceridwen us>
Date:   Sat Oct 9 11:21:45 2021 -0700

    Tell Flex not to build libfl
    
    It doesn't configure correctly on Apple Silicon and fails to build.

 modulesets-stable/bootstrap.modules | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/modulesets-stable/bootstrap.modules b/modulesets-stable/bootstrap.modules
index a360ba8e..f13647f2 100644
--- a/modulesets-stable/bootstrap.modules
+++ b/modulesets-stable/bootstrap.modules
@@ -107,7 +107,7 @@
   </autotools>
 
   <!-- As of 29 March 2021 Flex hasn't had an update since May 2017. -->
-  <autotools id="flex" autogen-sh="configure">
+  <autotools id="flex" autogen-sh="configure" autogenargs="--disable-libfl">
     <branch module="westes/flex/releases/download/v2.6.4/flex-2.6.4.tar.gz"
             repo="github" version="2.6.4"
             hash="sha256:e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995"/>