fix the script error

README.md

@@ -92,7 +92,7 @@ for android: http://demo:80/forward/live/livestream_sd.html
 <pre>
 killall -1 srs
 </pre>
-or use specified signal name to reload:<br/>
+or use specified signal to reload:<br/>
 <pre>
 killall -s SIGHUP srs
 </pre>

trunk/auto/build_ffmpeg.sh

@@ -86,7 +86,8 @@ else
         --enable-postproc --enable-bzlib --enable-zlib --enable-parsers \
         --enable-libfreetype \
         --enable-libx264 --enable-libmp3lame --enable-libaacplus \
-        --enable-pthreads --extra-libs=-lpthread --enable-encoders --enable-decoders --enable-avfilter --enable-muxers --enable-demuxers && 
+        --enable-pthreads --extra-libs=-lpthread \
+        --enable-encoders --enable-decoders --enable-avfilter --enable-muxers --enable-demuxers && 
     make && make install
-    ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build x264 failed"; exit 1; fi
+    ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build ffmpeg failed"; exit 1; fi
 fi