gst1-plugins-bad: build videoparsersbad plugin

gst1-plugins-bad: build videoparsersbad plugin

Build previously commented-out videoparsersbad plugins which contains
a bunch of useful format decoders:
 * av1parse: AV1 parser
 * diracparse: Dirac parser
 * h263parse: H.263 parser
 * h264parse: H.264 parser
 * h265parse: H.265 parser
 * jpeg2000parse: JPEG 2000 parser
 * mpeg4videoparse: MPEG 4 video elementary stream parser
 * mpegvideoparse: MPEG video elementary stream parser
 * pngparse: PNG parser
 * vc1parse: VC1 parser
 * vp9parse: VP9 parser

Signed-off-by: Daniel Golle <daniel@makrotopia.org>