scripts: autotools-install: update

* scripts/autotools-install: Increase automake's version number
to 1.15 and add Stefano Lattarini's new GPG key ID.
Increase gettext's version to 0.19.4 and add Daiki Ueno's GPG key ID.
Also move VERSION definition "up" so that it is once again
automatically updated via the emacs hook snippet at the end
of the file.

scripts/autotools-install

@@ -1,4 +1,6 @@
 #!/bin/sh
+VERSION='2015-01-25 15:45' # UTC
+
 # Building coreutils from a git-cloned directory may require versions of
 # tools like autoconf, automake, gettext, etc. that are newer than the ones
 # provided by the distribution on which you want to build.  In that case,
@@ -9,9 +11,12 @@
 # it tells you how to update envvars like PATH and (if you use pkg-config)
 # PKG_CONFIG_PATH.
 
-# Written by Jim Meyering
+# On principle, I find it best to ensure that packages I care about work
+# with the latest versions of all of these tools.  While these tools are
+# paragons of portability, you should ensure that recent distribution
+# versions work, too.
 
-VERSION='2012-08-31 07:40' # UTC
+# Written by Jim Meyering
 
 # For systems with limited/botched make (the case of most vendor makes!),
 # allow the user to override it.
@@ -24,9 +29,9 @@ tarballs='
   http://pkgconfig.freedesktop.org/releases/pkg-config-0.28.tar.gz
   http://ftp.gnu.org/gnu/m4/m4-1.4.17.tar.gz
   http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz
-  http://ftp.gnu.org/gnu/automake/automake-1.14.1.tar.gz
+  http://ftp.gnu.org/gnu/automake/automake-1.15.tar.gz
   http://ftp.gnu.org/gnu/libtool/libtool-2.4.2.tar.gz
-  http://ftp.gnu.org/gnu/gettext/gettext-0.18.3.2.tar.gz
+  http://ftp.gnu.org/gnu/gettext/gettext-0.19.4.tar.gz
 '
 
 usage() {
@@ -89,6 +94,8 @@ get_sources()
         --trusted-key=B93F60C6B5C4CE13          \
         --trusted-key=F382AE19F4850180          \
         --trusted-key=FC818E17429F96EA          \
+        --trusted-key=60F906016E407573          \
+        --trusted-key=D605848ED7E69871          \
         $base.sig > /dev/null 2>&1              \
       || echo "info: not verifying GPG signature for $base" 1>&2
   done