Update to latest 1.14 automake

This release comes with two important changes:

  1. It introduces a new feature aimed at making the implementation
     of non-recursive build systems more convenient and manageable
     (thanks to the new support for the '%reldir%' and '%canon_reldir%'
     automake-time substitutions).

  2. It improves the handling of C compiles not supporting the conjunct
     use of the '-c' and '-o' options (unfortunately, this improvement
     comes with a couple of minor backward-incompatibilities, described
     in detail in the NEWS section below). Among th other things, this
     means that you no longer need to explicitly call the AM_PROG_CC_C_O
     macro yourself in configure.ac (pre-existing invocation of this
     macro are of course still accepted and correctly working, for the
     sake of backward-compatibility).

The 1.14 release also introduces new (non-fatal) runtime warnings to
simplify the transition to Automake 2.0. You are free to ignore such
warnings for now, but should address them before the transition to
Automake 2.0 (whose ETA is about one year from now, maybe more, so no
need to hurry yet).

More info:

   http://lists.gnu.org/archive/html/automake/2013-06/msg00040.html

Download here:

  ftp://ftp.gnu.org/gnu/automake/automake-1.14.tar.gz
  ftp://ftp.gnu.org/gnu/automake/automake-1.14.tar.xz