build: fix build for simulator

- disable arm64 build for simulator.
- fix linking with fat libs

arm64 for simulator could be enabled again when fixed

Change-Id: I53cdaf486b6e49ffc1d78c083d8b87e242424424
diff --git a/compile-ios.sh b/compile-ios.sh
index 88190bb..82fc6b7 100755
--- a/compile-ios.sh
+++ b/compile-ios.sh
@@ -174,6 +174,7 @@
   rsync -ar $DAEMON_DIR/contrib/$HOST/include/json $IOS_TOP_DIR/DEPS/$ARCH/include/
   rsync -ar $DAEMON_DIR/contrib/$HOST/include/msgpack $IOS_TOP_DIR/DEPS/$ARCH/include/
   rsync -ar $DAEMON_DIR/contrib/$HOST/include/yaml-cpp $IOS_TOP_DIR/DEPS/$ARCH/include/
+  rsync -ar $DAEMON_DIR/contrib/$HOST/include/libavutil $IOS_TOP_DIR/DEPS/$ARCH/include/
   cd $IOS_TOP_DIR/DEPS/$ARCH/lib/
   for i in *.a ; do mv "$i" "${i/-$HOST.a/.a}" ; done