ffmpeg: bump version (#1712)

media-video/ffmpeg/patches/ffmpeg-3.4.patchset

@@ -0,0 +1,21 @@
+From c2b5fa37ae0ed5af19e1f171b458fa65d673400d Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Mon, 16 Oct 2017 18:31:07 +0200
+Subject: disable ebx on x86.
+
+
+diff --git a/configure b/configure
+index 18d80ee..1547cf8 100755
+--- a/configure
++++ b/configure
+@@ -6594,6 +6594,7 @@ 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
+ 
+ # add_dep lib dep
+-- 
+2.7.0
+