Create directory before moving items.

`Move-Item` moves items to a file if the destination does not exist.
In addition, this fixes the platform value for the Package Windows SDK
job.

Author: Steelskin

.github/workflows/swift-toolchain.yml

@@ -3832,11 +3832,11 @@ jobs:
       matrix:
         include:
           - arch: amd64
-            platform: x64
+            platform: x86_64
           - arch: arm64
-            platform: arm64
+            platform: aarch64
           - arch: x86
-            platform: x86
+            platform: i686
 
     steps:
       - uses: thebrowsercompany/gha-download-tar-artifact@59992d91335d4ecba543c8535f7d07238e42125d # main
@@ -3877,14 +3877,16 @@ jobs:
           }
 
       - run: |
+          New-Item -Path "${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/" -ItemType Directory -Force
+
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/dispatch ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/os ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/Block ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/BlocksRuntime.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/dispatch.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/swiftDispatch.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/
-          Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/_foundation_unicode ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include
-          Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/_FoundationCShims ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include
+          Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/_foundation_unicode ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/
+          Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/_FoundationCShims ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/Foundation.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/FoundationXML.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/
           Move-Item ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/FoundationNetworking.lib ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/lib/swift/windows/${{ matrix.platform }}/