autotools: Fix pkg.m4 check

autogen.sh

@@ -64,8 +64,7 @@ if [ ! -d $srcdir/m4 ]; then
         mkdir $srcdir/m4
 fi
 
-# Replaced by autoreconf below
-autoreconf -if -Wall || exit 1
+aclocal
 
 if ! grep -q pkg.m4 aclocal.m4; then
     cat <<EOF
@@ -76,6 +75,8 @@ EOF
     exit 1
 fi
 
+autoreconf -if -Wall || exit 1
+
 cd $THEDIR
 
 if test x$OBJ_DIR != x; then