Make logging in wasmkit.py resilient to file renaming

Author: MaxDesiatov

utils/swift_build_support/swift_build_support/products/wasmkit.py

@@ -76,7 +76,10 @@ def run_swift_build(host_target, product, swiftpm_package_product_name, set_inst
     swift_build = os.path.join(product.install_toolchain_path(host_target), "bin", "swift-build")
 
     if not os.path.exists(swift_build) or product.args.build_runtime_with_host_compiler:
-        print("WARNING: build-script's `wasmkit.py` is running local development code path, don't use for deployment!")
+        print(
+            f"WARNING: build-script's {os.path.basename(__file__)} is running local development code path, "
+            "don't use these build artifacts for deployment!"
+        )
         swift_build = product.toolchain.swift_build
 
     if host_target.startswith('macos'):