build: improve project bootstrapping

Align autogen.sh with the one in NM:
  * Just calling autoreconf once
  * Using autopoint from GNU gettext
  * Enabling the use of NOCONFIGURE

.gitignore

@@ -49,10 +49,48 @@ po/POTFILES
 po/stamp-it
 po/.intltool-merge-cache
 po/ModemManager.pot
+po/Makevars.template
+po/Rules-quot
+po/boldquot.sed
+po/en@boldquot.header
+po/en@quot.header
+po/insert-header.sin
+po/quot.sed
+po/remove-potcdate.sin
 
 m4/gtk-doc.m4
 m4/intltool.m4
 m4/libtool.m4
 m4/lt*.m4
+m4/codeset.m4
+m4/gettext.m4
+m4/glibc2.m4
+m4/glibc21.m4
+m4/iconv.m4
+m4/intdiv0.m4
+m4/intl.m4
+m4/intldir.m4
+m4/intlmacosx.m4
+m4/intmax.m4
+m4/inttypes-pri.m4
+m4/inttypes_h.m4
+m4/lcmessage.m4
+m4/lib-ld.m4
+m4/lib-link.m4
+m4/lib-prefix.m4
+m4/lock.m4
+m4/longlong.m4
+m4/nls.m4
+m4/po.m4
+m4/printf-posix.m4
+m4/progtest.m4
+m4/size_max.m4
+m4/stdint_h.m4
+m4/uintmax_t.m4
+m4/visibility.m4
+m4/wchar_t.m4
+m4/wint_t.m4
+m4/xsize.m4
 
 TAGS
+ABOUT-NLS

autogen.sh

@@ -3,7 +3,7 @@
 
 srcdir=`dirname $0`
 test -z "$srcdir" && srcdir=.
-REQUIRED_AUTOMAKE_VERSION=1.7
+REQUIRED_AUTOMAKE_VERSION=1.9
 PKG_NAME=ModemManager
 
 (test -f $srcdir/configure.ac \
@@ -14,8 +14,9 @@ PKG_NAME=ModemManager
 }
 
 (cd $srcdir;
-    autoreconf --install --symlink &&
-    intltoolize --force &&
-    autoreconf &&
-    ./configure --enable-maintainer-mode $@
+    autopoint --force
+    AUTOPOINT='intltoolize --automake --copy' autoreconf --force --install --verbose
+    if test -z "$NOCONFIGURE"; then
+        ./configure --enable-maintainer-mode $@
+    fi
 )

configure.ac

@@ -24,10 +24,14 @@ LT_INIT
 dnl
 dnl translation support
 dnl
+IT_PROG_INTLTOOL([0.40.0])
+
+AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION([0.17])
+
 GETTEXT_PACKAGE=ModemManager
 AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [Gettext package])
-IT_PROG_INTLTOOL([0.35.0])
 
 PKG_CHECK_MODULES(MM,
                   dbus-glib-1 >= 0.86