Update MVK with fixed avcodec for ARM compilation

compileVLCforiOS.sh

@@ -12,7 +12,7 @@ CONFIGURATION="Release"
 NONETWORK=no
 SKIPLIBVLCCOMPILATION=no
 
-TESTEDVLCKITHASH=d0e7b32b4
+TESTEDVLCKITHASH=4a8d6272e
 TESTEDMEDIALIBRARYKITHASH=9c6382eb1
 
 usage()