git: openjdk/jfx: master: 8288450: Update attribution in gstreamer.md file

[Alexander Matveev]

Changeset: 54e689ce
Author:    Alexander Matveev <almatvee at openjdk.org>
Date:      2022-07-21 22:30:37 +0000
URL:       https://git.openjdk.org/jfx/commit/54e689ce639ee182113dab610d9ed82890493898

8288450: Update attribution in gstreamer.md file
8288449: Update attribution in glib.md file

Reviewed-by: kcr, angorya

! modules/javafx.media/src/main/legal/glib.md
! modules/javafx.media/src/main/legal/gstreamer.md
- modules/javafx.media/src/main/native/gstreamer/3rd_party/glib/glib/valgrind.h