[Build] Do not strip swift prefix for WASI SDK bundle

Match the static Linux SDK - leave the `swift-` prefix on the generated
artifact bundle.

Author: bnbarham

utils/swift_build_support/swift_build_support/products/wasmswiftsdk.py

@@ -140,7 +140,7 @@ def build(self, host_target):
         swift_run = os.path.join(toolchain_path, 'bin', 'swift-run')
 
         swift_version = os.environ.get('TOOLCHAIN_VERSION',
-                                       'swift-DEVELOPMENT-SNAPSHOT').lstrip('swift-')
+                                       'swift-DEVELOPMENT-SNAPSHOT')
         run_args = [
             swift_run,
             '--package-path', self.source_dir,