GHA: shuffle the Foundation headers

The installer rules are progressively assuming a fully staged toolchain.
We did not previously shuffle the C headers that Foundation expects into
the correct location. Do so to allow packaging with the updated
manifest.

Author: compnerd

.github/workflows/swift-toolchain.yml

@@ -3563,6 +3563,13 @@ jobs:
             Install-Package -Name WixToolset.Sdk -RequiredVersion 4.0.1 -Force
           }
 
+      - run: |
+          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/_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
+
       - name: Package SDK
         run: |
           msbuild -nologo -restore -maxCpuCount `