update build ffmpeg script bug for ubuntu, remove the opencl from x264

@@ -59,7 +59,7 @@ else
     echo "build x264"
     cd $ff_current_dir &&
     rm -rf x264-snapshot-20131129-2245-stable && unzip -q ${ff_src_dir}/x264-snapshot-20131129-2245-stable.zip &&
-    cd x264-snapshot-20131129-2245-stable && ./configure --prefix=${ff_release_dir} --bit-depth=8 --enable-static && make && make install
+    cd x264-snapshot-20131129-2245-stable && ./configure --prefix=${ff_release_dir} --disable-opencl --bit-depth=8 --enable-static && make && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build x264 failed"; exit 1; fi
 fi