Backport of "Replace GPL v2 with LGPL v2 in COPYING file" into 1.18
requested to merge tpm/gst-plugins-bad:backport-mr-1631-into-1.18-replace-gpl-with-lgpl-in-copying into 1.18
Backport of !1631 (merged) "Replace GPL v2 with LGPL v2 in COPYING file".
Commits: