contrib: update ffmpeg to release 4.4

Change-Id: Ia231c1b7749cce1bfb220f869d8a48283979f0ca

AudioFilter/ffmpeg/package.json

 {
     "name": "ffmpeg",
-    "version": "9f38fac053010205806ece11e6aea9b7d3bde041",
+    "version": "n4.4",
     "url": "https://github.com/FFmpeg/FFmpeg/archive/__VERSION__.tar.gz",
     "deps": [
         "vpx",

AudioFilter/ffmpeg/rules.mak

-ifdef HAVE_DARWIN_OS
-FFMPEG_HASH := n4.2.2
-else
-FFMPEG_HASH := 9f38fac053010205806ece11e6aea9b7d3bde041
-endif
+FFMPEG_HASH := n4.4
 
 FFMPEG_URL := https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/$(FFMPEG_HASH).tar.gz
 

GreenScreen/ffmpeg/package.json

 {
     "name": "ffmpeg",
-    "version": "9f38fac053010205806ece11e6aea9b7d3bde041",
+    "version": "n4.4",
     "url": "https://github.com/FFmpeg/FFmpeg/archive/__VERSION__.tar.gz",
     "deps": [
         "zlib",

GreenScreen/ffmpeg/rules.mak

-FFMPEG_HASH := 9f38fac053010205806ece11e6aea9b7d3bde041
+FFMPEG_HASH := n4.4
 FFMPEG_URL := https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/$(FFMPEG_HASH).tar.gz
 
 PKGS+=ffmpeg

WaterMark/ffmpeg/package.json

 {
     "name": "ffmpeg",
-    "version": "9f38fac053010205806ece11e6aea9b7d3bde041",
+    "version": "n4.4",
     "url": "https://github.com/FFmpeg/FFmpeg/archive/__VERSION__.tar.gz",
     "deps": [
         "zlib",

WaterMark/ffmpeg/rules.mak

-FFMPEG_HASH := 9f38fac053010205806ece11e6aea9b7d3bde041
+FFMPEG_HASH := n4.4
 FFMPEG_URL := https://git.ffmpeg.org/gitweb/ffmpeg.git/snapshot/$(FFMPEG_HASH).tar.gz
 
 PKGS+=ffmpeg