manylinux: use --disable-asm to eliminate all non-PIC assembly in FFmpeg

Author: shimat

docker/manylinux/build_static_deps.sh

@@ -38,7 +38,7 @@ cd "ffmpeg-${FFMPEG_VERSION}"
     --enable-static \
     --disable-shared \
     --enable-pic \
-    --disable-x86asm \
+    --disable-asm \
     --disable-doc \
     --disable-programs \
     --disable-debug \