Revert "We don't want to use autopoint, since we use external gettext anyway"

Autopoint is required regardless of libintl inclusion.
Fix bootstrap failure on clean tree.

This reverts commit aae26a98.

bootstrap

@@ -127,7 +127,7 @@ set -x
 echo > vlc-config.in
 cp -f INSTALL INSTALL.svn
 
-AUTOPOINT=true autoreconf --install --force --verbose ${ACLOCAL_ARGS}
+autoreconf --install --force --verbose ${ACLOCAL_ARGS}
 rm -f po/Makevars.template
 echo > ABOUT-NLS
 mv -f INSTALL.svn INSTALL