gst-plugins-base: add legal info

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-base/gst-plugins-base.mk

@@ -8,6 +8,8 @@ GST_PLUGINS_BASE_VERSION = 0.10.36
 GST_PLUGINS_BASE_SOURCE = gst-plugins-base-$(GST_PLUGINS_BASE_VERSION).tar.xz
 GST_PLUGINS_BASE_SITE = http://gstreamer.freedesktop.org/src/gst-plugins-base
 GST_PLUGINS_BASE_INSTALL_STAGING = YES
+GST_PLUGINS_BASE_LICENSE = GPLv2+, LGPLv2+
+GST_PLUGINS_BASE_LICENSE_FILES = COPYING COPYING.LIB
 
 # freetype is only used by examples, but if it is not found
 # and the host has a freetype-config script, then the host