Set custom linker

Author: justsmth

.github/workflows/cross.yml

@@ -356,9 +356,11 @@ jobs:
         env:
           CC: "C:/Program Files/LLVM/bin/clang.exe"
           CXX: "C:/Program Files/LLVM/bin/clang++.exe"
+          AWS_LC_SYS_CMAKE_LINKER: "C:/Program Files/LLVM/bin/clang.exe"
         run: cargo build -p aws-lc-rs --target x86_64-pc-windows-gnullvm --features bindgen
       - name: Test
         env:
           CC: "C:/Program Files/LLVM/bin/clang.exe"
           CXX: "C:/Program Files/LLVM/bin/clang++.exe"
+          AWS_LC_SYS_CMAKE_LINKER: "C:/Program Files/LLVM/bin/clang.exe"
         run: cargo test -p aws-lc-rs --target x86_64-pc-windows-gnullvm --features bindgen