mplayer: Update 'configure' patch

Closes Homebrew/homebrew#15494.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/mplayer.rb

@@ -62,15 +62,15 @@ end
 
 __END__
 diff --git a/configure b/configure
-index bbfcd51..5734024 100755
+index a1fba5f..5deaa80 100755
 --- a/configure
 +++ b/configure
-@@ -48,8 +48,6 @@ if test -e ffmpeg/mp_auto_pull ; then
+@@ -49,8 +49,6 @@ if test -e ffmpeg/mp_auto_pull ; then
  fi
  
  if ! test -e ffmpeg ; then
 -    echo "No FFmpeg checkout, press enter to download one with git or CTRL+C to abort"
 -    read tmp
-     if ! git clone --depth 1 git://git.videolan.org/ffmpeg.git ffmpeg ; then
+     if ! git clone --depth 1 git://source.ffmpeg.org/ffmpeg.git ffmpeg ; then
          rm -rf ffmpeg
          echo "Failed to get a FFmpeg checkout"