Update setup.sh

setup.sh

@@ -2,6 +2,14 @@
 
 set -e
 
+echo "Defaulting to nightly"
+rustup default nightly
+echo "Downloading rust source"
+rustup component add rust-src
+echo "Installing xargo"
+cargo install -f xargo
+
+echo "Building libstd"
 ./cook.sh libstd unfetch
 ./cook.sh libstd fetch
 ./cook.sh libstd build