ci : set CUDACXX to use sccache for nvcc.exe

Author: danbev

.github/workflows/build.yml

@@ -684,6 +684,7 @@ jobs:
       - name: Configure CMake
         shell: cmd
         run: |
+          set "CUDACXX=sccache %CUDA_PATH%\bin\nvcc.exe"
           cmake -S . -B ./build -A ${{ matrix.arch }} ^
             -DCMAKE_BUILD_TYPE=${{ matrix.build }} ^
             -DGGML_CUDA=${{ matrix.cublas }} ^
@@ -696,6 +697,10 @@ jobs:
             -DCMAKE_POLICY_CMP0141=NEW ^
             -DSDL2_DIR="%SDL2_DIR%"
 
+      - name: Check sccache status after build
+        run: |
+          sccache --show-stats
+
       - name: Build Project
         shell: cmd
         run: |