[PATCH] Require bison 2.7 or newer for regenerating intl/plural.y

[Steve Ellcey]

On Thu, 2014-12-11 at 17:32 +0000, Will Newton wrote:
> The merge of the latest gettext code introduced changes to the yacc
> parser source that are incompatible with versions of bison older
> than 2.7. Add a configure check for the appropriate versions and
> document the requirement in INSTALL.
> 
> ChangeLog:
> 
> 2014-12-11  Will Newton  <will.newton@linaro.org>
> 
> 	* INSTALL: Document that we require bison 2.7 or above.
> 	* configure: Regenerate.
> 	* configure.ac: Use AC_CHECK_PROG_VER instead of
> 	AC_PATH_PROG when checking for bison and check for
> 	version 2.7 or above.

This patch fixes the build problem I have on ubuntu 12.04 with bison
2.5.  Can someone approve it for checkin?

Steve Ellcey
sellcey@imgtec.com