Fix build of arc64 on MacOS

When we try to build arc64 on MacOS we run into two issues:
1. patches-arc64 isn't being copied over to the disk image
2. the binutils patch does apply cleanly

To fix these issues:
1. Update go.sh to copy patches-arc64 over to mounted disk image
2. Re-generate binutils ARC64 patch to apply cleanly

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

go.sh

@@ -38,6 +38,7 @@ if [ "$machine" == "Mac" ]; then
 		hdiutil mount ${ImageNameExt}
 	fi
 	cp -a patches /Volumes/$ImageName
+	cp -a patches-arc64 /Volumes/$ImageName
 	cp -a overlays /Volumes/$ImageName
 	cd /Volumes/$ImageName
 fi