gst-plugins-bad: add legal info

Even though COPYING.LIB is LGPLv2+ many code files state v2.1+

Signed-off-by: Gustavo Zacarias <gustavo.zacarias@free-electrons.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gstreamer/gst-plugins-bad/gst-plugins-bad.mk

@@ -7,6 +7,9 @@
 GST_PLUGINS_BAD_VERSION = 0.10.23
 GST_PLUGINS_BAD_SOURCE = gst-plugins-bad-$(GST_PLUGINS_BAD_VERSION).tar.xz
 GST_PLUGINS_BAD_SITE = http://gstreamer.freedesktop.org/src/gst-plugins-bad
+# COPYING.LIB is in fact v2, but most of the code is v2.1+
+GST_PLUGINS_BAD_LICENSE = LGPLv2.1+, GPLv2+
+GST_PLUGINS_BAD_LICENSE_FILES = COPYING.LIB COPYING
 
 GST_PLUGINS_BAD_CONF_OPTS = \
 	--disable-examples