remove useless __MACOSX folder after downloading dependencies on OS X

osx/download_dependencies.sh

@@ -5,6 +5,7 @@ else
 	# Download and unpack OS X prebuilt dependencies
 	curl -o ../xcode-pack.zip -L http://download.vcmi.eu/xcode-pack.zip
 	unzip ../xcode-pack.zip -d ../
+	rm -rf ../__MACOSX
 
 	# Build vcmibuilder
 	xcodebuild -project osx/osx-vcmibuilder/vcmibuilder.xcodeproj/ -configuration Release