ffmpeg: add recipe for version 3.3.

media-video/ffmpeg/patches/ffmpeg-3.3.patchset

@@ -0,0 +1,21 @@
+From 88bf339b083a0945ddb56ca5b78708bbc1141fa6 Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Sat, 9 Apr 2016 17:37:09 +0000
+Subject: disable ebx on x86.
+
+
+diff --git a/configure b/configure
+index a1818dc..26af622 100755
+--- a/configure
++++ b/configure
+@@ -6324,6 +6324,7 @@ enabled threads && ! enabled pthreads && ! enabled atomics_native && die "non pt
+ if test $target_os = "haiku"; then
+     disable memalign
+     disable posix_memalign
++    enabled x86_32 && enabled shared && disable ebx_available
+ fi
+ 
+ enabled_all dxva2 dxva2api_cobj CoTaskMemFree &&
+-- 
+2.7.0
+