autotools: Rewrite configuration in a minimalistic fashion

Drop the per-codec options while at it, since we'll soon include a copy
of the associated headers.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

autogen.sh

@@ -1,7 +1,8 @@
-#! /bin/sh
+#!/bin/sh
 
-autoreconf -v --install
+autoreconf -vi
 
-if test -z "$NOCONFIGURE"; then
-    ./configure "$@"
+if [ -z "$NOCONFIGURE" ]
+then
+	./configure "$@"
 fi