gstreamer1: bump to version 1.12.4

Fixes #10631

The gstreamer plugins were recently bumped to 1.12.4, but the main
gstreamer1 package not.  Fix that.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gstreamer1/gstreamer1/gstreamer1.hash

@@ -1,2 +1,2 @@
-# From https://gstreamer.freedesktop.org/src/gstreamer/gstreamer-1.12.3.tar.xz.sha256sum
-sha256 d388f492440897f02b01eebb033ca2d41078a3d85c0eddc030cdea5a337a216e gstreamer-1.12.3.tar.xz
+# From https://gstreamer.freedesktop.org/src/gstreamer/gstreamer-1.12.4.tar.xz.sha256sum
+sha256 5a8704aa4c2eeb04da192c4a9942f94f860ac1a585de90d9f914bac26a970674 gstreamer-1.12.4.tar.xz

package/gstreamer1/gstreamer1/gstreamer1.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GSTREAMER1_VERSION = 1.12.3
+GSTREAMER1_VERSION = 1.12.4
 GSTREAMER1_SOURCE = gstreamer-$(GSTREAMER1_VERSION).tar.xz
 GSTREAMER1_SITE = https://gstreamer.freedesktop.org/src/gstreamer
 GSTREAMER1_INSTALL_STAGING = YES