[ffmpeg] fix copy&paste typo

[Dominik Mierzejewski]

commit 1ed1222763077be60b17bcd90094fdfb31d2f8d9
Author: Dominik 'Rathann' Mierzejewski <rpm at greysector.net>
Date:   Sat Sep 3 16:02:40 2016 +0200

    fix copy&paste typo

 ffmpeg.spec | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/ffmpeg.spec b/ffmpeg.spec
index 4a92ae5..53e9829 100644
--- a/ffmpeg.spec
+++ b/ffmpeg.spec
@@ -245,7 +245,7 @@ cp -pr doc/examples/{*.c,Makefile,README} _doc/examples/
     --cpu=%{_target_cpu} \
 %endif
 %ifarch %{ix86} x86_64
-    %{!?_without_qsv:--enable-libmfx} \\\
+    %{!?_without_qsv:--enable-libmfx} \
 %endif
 %ifarch %{ix86} x86_64 ppc ppc64
     --enable-runtime-cpudetect \