Try out --build-system swiftbuild w/ main snapshots (#219)

This gives more exposure for the new SwiftPM build system when testing WasmKit in Linux jobs.

Author: MaxDesiatov

.github/workflows/main.yml

@@ -143,9 +143,16 @@ jobs:
             wasi-swift-sdk-id: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm
             wasi-swift-sdk-checksum: "b64dfad9e1c9ccdf06f35cf9b1a00317e000df0c0de0b3eb9f49d6db0fcba4d9"
             test-args: "--traits WasmDebuggingSupport -Xswiftc -DWASMKIT_CI_TOOLCHAIN_NIGHTLY"
+          - swift: "swiftlang/swift:nightly-main-noble"
+            development-toolchain-download: "https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a-ubuntu24.04.tar.gz"
+            wasi-swift-sdk-download: "https://download.swift.org/development/wasm-sdk/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm.artifactbundle.tar.gz"
+            wasi-swift-sdk-id: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm
+            wasi-swift-sdk-checksum: "b64dfad9e1c9ccdf06f35cf9b1a00317e000df0c0de0b3eb9f49d6db0fcba4d9"
+            test-args: "--traits WasmDebuggingSupport -Xswiftc -DWASMKIT_CI_TOOLCHAIN_NIGHTLY --build-system swiftbuild"
+            label: " --build-system swiftbuild"
 
     runs-on: ubuntu-24.04
-    name: "build-linux (${{ matrix.swift }})"
+    name: "build-linux (${{ matrix.swift }}${{ matrix.label }})"
 
     steps:
       - uses: actions/checkout@v4