[newlib-cygwin] newlib: require automake-1.11.6

[Jeff Johnston <jjohnstn@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=1162f09b6cecaa159531e92bf1e26a88eabba771

commit 1162f09b6cecaa159531e92bf1e26a88eabba771
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Thu Dec 30 14:03:30 2021 -0500

    newlib: require automake-1.11.6
    
    This is simply reflecting reality: all the subdirs in here are already
    using automake-1.11.6, so making it a requirement will allow us to stop
    suggesting we might support automake-1.9 or 1.10 (which I'm fairly sure
    do not work today).
    
    This is why only acinclude.m4 changes in this patch: the generated files
    are exactly the same as the directives here are automake constraints,
    not generated code logic.

Diff:
---
 newlib/acinclude.m4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/newlib/acinclude.m4 b/newlib/acinclude.m4
index 3ec3fe500..3ad0e8906 100644
--- a/newlib/acinclude.m4
+++ b/newlib/acinclude.m4
@@ -120,9 +120,9 @@ AC_SUBST(newlib_basedir)
 
 AC_CANONICAL_HOST
 
-AM_INIT_AUTOMAKE([foreign no-installinfo no-dependencies no-dist no-define 1.9.5])
+AM_INIT_AUTOMAKE([foreign no-installinfo no-dependencies no-dist no-define 1.11.6])
 AM_MAINTAINER_MODE()
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES(yes)])
+AM_SILENT_RULES(yes)
 
 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We