Update GCC to autoconf 2.69, automake 1.15.1

[Joseph Myers]

On Wed, 31 Oct 2018, Simon Marchi wrote:

> On 2018-10-30 11:26 p.m., Joseph Myers wrote:
> > This patch (diffs to generated files omitted below) updates GCC to use
> > autoconf 2.69 and automake 1.15.1.  (That's not the latest automake
> > version, but it's the one used by binutils-gdb, with which consistency
> > is desirable, and in any case seems a useful incremental update that
> > should make a future update to 1.16.1 easier.)
> 
> Whenever you feel like bumping gcc to 1.16.1, I can take care of binutils-gdb.

Before possibly doing that we should get shared files back in sync again.

I've just applied my changes to shared files (where they went beyond 
yours) to binutils-gdb, and also merged a couple of other config/ changes 
from GCC to binutils-gdb (and done the consequent configure regenerations 
in libdecnumber and zlib).  There are also libiberty changes, and changes 
to shared various top-level files, that need to be got back in sync.  I 
haven't examined them in detail but it seems mostly to be changes on the 
GCC side needing to be applied to binutils-gdb.

-- 
Joseph S. Myers
joseph@codesourcery.com