GHA: enable HCS on Windows toolchains

Now that the just built clang should no longer perform HCS on scoped EH
functions, we should be able to enable this optimization globally.

Author: compnerd

.github/workflows/swift-toolchain.yml

@@ -2585,10 +2585,10 @@ jobs:
                 -D CMAKE_BUILD_TYPE=Release `
                 -D CMAKE_C_COMPILER=${CLANG_CL} `
                 -D CMAKE_C_COMPILER_TARGET=${{ matrix.triple }} `
-                -D CMAKE_C_FLAGS="${{ inputs.WINDOWS_CMAKE_C_FLAGS }} -Xclang -fno-split-cold-code" `
+                -D CMAKE_C_FLAGS="${{ inputs.WINDOWS_CMAKE_C_FLAGS }}" `
                 -D CMAKE_CXX_COMPILER=${CLANG_CL} `
                 -D CMAKE_CXX_COMPILER_TARGET=${{ matrix.triple }} `
-                -D CMAKE_CXX_FLAGS="${{ inputs.WINDOWS_CMAKE_CXX_FLAGS }} -Xclang -fno-split-cold-code -I ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include -I ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/Block" `
+                -D CMAKE_CXX_FLAGS="${{ inputs.WINDOWS_CMAKE_CXX_FLAGS }} -I ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include -I ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/Windows.platform/Developer/SDKs/Windows.sdk/usr/include/Block" `
                 -D CMAKE_MT=mt `
                 -D CMAKE_INSTALL_PREFIX=${{ github.workspace }}/BuildRoot-DevTools/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr `
                 -D CMAKE_Swift_COMPILER=${SWIFTC} `
@@ -2615,10 +2615,10 @@ jobs:
                 -D CMAKE_BUILD_TYPE=Release `
                 -D CMAKE_C_COMPILER=${CLANG_CL} `
                 -D CMAKE_C_COMPILER_TARGET=${{ matrix.triple }} `
-                -D CMAKE_C_FLAGS="${{ inputs.WINDOWS_CMAKE_C_FLAGS }} -Xclang -fno-split-cold-code" `
+                -D CMAKE_C_FLAGS="${{ inputs.WINDOWS_CMAKE_C_FLAGS }}" `
                 -D CMAKE_CXX_COMPILER=${CLANG_CL} `
                 -D CMAKE_CXX_COMPILER_TARGET=${{ matrix.triple }} `
-                -D CMAKE_CXX_FLAGS="${{ inputs.WINDOWS_CMAKE_CXX_FLAGS }} -Xclang -fno-split-cold-code" `
+                -D CMAKE_CXX_FLAGS="${{ inputs.WINDOWS_CMAKE_CXX_FLAGS }}" `
                 -D CMAKE_MT=mt `
                 -D CMAKE_INSTALL_PREFIX=${{ github.workspace }}/BuildRoot-DevTools/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr `
                 -D CMAKE_Swift_COMPILER=${SWIFTC} `