add release build script (for wasm crasher)

Author: sliemeobn

Examples/Swiftle/build-full-release.sh

@@ -0,0 +1,8 @@
+OUTDIR=Public/lib/swiftle
+set -ex
+
+swift package \
+  --swift-sdk "$(swiftc -print-target-info | jq -r '.swiftCompilerTag')_wasm" \
+  --enable-experimental-prebuilts \
+  --allow-writing-to-package-directory \
+  js -c release --output $OUTDIR --use-cdn --debug-info-format dwarf