Fix CI: clone submodules and auto-detect library path

The Khronos OpenVX sample implementation requires git submodules for
building. Also dynamically find the library output path instead of
hardcoding it.

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

Author: kiritigowda

.github/workflows/ci.yml

@@ -19,19 +19,27 @@ jobs:
 
       - name: Build Khronos OpenVX sample implementation
         run: |
-          git clone --depth 1 https://github.com/KhronosGroup/OpenVX-sample-impl.git /tmp/openvx-sample
+          git clone --recursive --depth 1 https://github.com/KhronosGroup/OpenVX-sample-impl.git /tmp/openvx-sample
           cd /tmp/openvx-sample
           python Build.py --os=Linux --arch=64 --conf=Release
 
+      - name: Find OpenVX libraries
+        id: openvx
+        run: |
+          LIB_DIR=$(dirname $(find /tmp/openvx-sample -name "libopenvx.so" | head -1))
+          echo "lib_dir=$LIB_DIR" >> "$GITHUB_OUTPUT"
+          echo "Found OpenVX libraries in: $LIB_DIR"
+          ls -la "$LIB_DIR"/libopenvx* "$LIB_DIR"/libvxu* 2>/dev/null || true
+
       - name: Build openvx-mark
         run: |
           mkdir build && cd build
           cmake -DOPENVX_INCLUDES=/tmp/openvx-sample/include \
-                -DOPENVX_LIB_DIR=/tmp/openvx-sample/install/Linux/x64/Release/bin ..
+                -DOPENVX_LIB_DIR=${{ steps.openvx.outputs.lib_dir }} ..
           cmake --build . -j$(nproc)
 
       - name: Run openvx-mark
         run: |
           cd build
-          export LD_LIBRARY_PATH=/tmp/openvx-sample/install/Linux/x64/Release/bin:$LD_LIBRARY_PATH
+          export LD_LIBRARY_PATH=${{ steps.openvx.outputs.lib_dir }}:$LD_LIBRARY_PATH
           ./openvx-mark --resolution VGA --iterations 10 --warmup 3