fix sdk build script

Author: dr-bonez

core/install-sdk.sh

@@ -12,7 +12,7 @@ if [ -z "$PLATFORM" ]; then
   export PLATFORM=$(uname -m)
 fi
 
-cargo install --path=./startos --no-default-features --features=js_engine,sdk,cli --locked
+cargo install --path=./startos --no-default-features --features=js-engine,sdk,cli --locked
 startbox_loc=$(which startbox)
 ln -sf $startbox_loc $(dirname $startbox_loc)/start-cli
 ln -sf $startbox_loc $(dirname $startbox_loc)/start-sdk