ext/pango/gsttextoverlay.c: Add copyright block and fix plugin license field

ext/pango/gsttextoverlay.c: Add copyright block and fix plugin license field

Original commit message from CVS:
* ext/pango/gsttextoverlay.c: Add copyright block and fix plugin
license field
* gst-libs/gst/idct/Makefile.am: Remove mmx/sse code
* gst-libs/gst/video/gstvideosink.c: Change copyright block to
LGPL.
* gst/auparse/gstauparse.c: Fix plugin license field.
* gst/monoscope/gstmonoscope.c: Fix plugin license field.
* gst/mpeg1sys/gstmpeg1systemencode.c: Fix plugin license field.
* gst/rtp/gstrtp.c: Fix plugin license field.