Use curl if available

src/Skia/getnatives.sh

@@ -1,7 +1,13 @@
 #!/bin/sh
-rm -rf native
+rm -rf native native.zip
 mkdir -p native
 cd native
+if which curl
+then
+curl `cat ../native.url` -o native.zip
+else
 wget `cat ../native.url` -O native.zip
-unzip native.zip
+fi
 
+unzip native.zip
+chmod -R +x .