Debian workflow: use correct Vulkan ICD path for llvmpipe on trixie. Fixes #884.

Author: azonenberg

.github/workflows/build-debian.yml

@@ -172,12 +172,20 @@ jobs:
         ninja doc
 
     - name: Run Tests
-      if: ${{ !  matrix.docs }}
+      if: ${{ !  matrix.docs }} && {matrix.os = 'debian-oldstable'}
       run: |
         export VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/lvp_icd.x86_64.json
         cd build
         ctest --output-on-failure
 
+    # vulkan ICD path changed from bookworm to trixie so need to consider both
+     - name: Run Tests
+      if: ${{ !  matrix.docs }} && {matrix.os = 'debian-stable'}
+      run: |
+        export VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/lvp_icd.json
+        cd build
+        ctest --output-on-failure
+
     - name: Upload Artifacts
       if: ${{ !  matrix.docs }}
       uses: actions/upload-artifact@v4