Add first and second output to earlyclobbers in COPY3_IF_LT macro.

patch by Ramiro Ribeiro Polla, ramiro lisha.ufsc br
Original thread:
date: Mar 27, 2007 11:21 PM
subject: [Ffmpeg-devel] [PATCH] fix build for --cpu=i686

Originally committed as revision 8604 to svn://svn.ffmpeg.org/ffmpeg/trunk