package/gstreamer1/gst1-plugins-bad: fix meson options

Fix teletextdec name and remove vdpau which is no longer available.

Fixes:
output/build/gst1-plugins-bad-1.18.5/meson.build:1:0: ERROR: Unknown options: "teletextdec, vdpau"

(WARNING for now, but will be an error in meson 0.60.0).

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 87505ba9478fa039a72eaa984c07733cdd5ea280)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gstreamer1/gst1-plugins-bad/gst1-plugins-bad.mk

@@ -59,12 +59,11 @@ GST1_PLUGINS_BAD_CONF_OPTS += \
 	-Dofa=disabled \
 	-Dopenexr=disabled \
 	-Dopenni2=disabled \
-	-Dteletextdec=disabled \
+	-Dteletext=disabled \
 	-Dwildmidi=disabled \
 	-Dsmoothstreaming=disabled \
 	-Dsoundtouch=disabled \
 	-Dgme=disabled \
-	-Dvdpau=disabled \
 	-Dspandsp=disabled \
 	-Dsvthevcenc=disabled \
 	-Dtranscode=disabled \