get the OpenCL Extension Loader from the cl_khr_unified_svm branch

This should not be merged either.

Author: bashbaug

.github/workflows/build.yml

@@ -65,6 +65,7 @@ jobs:
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         repository: bashbaug/opencl-extension-loader
+        ref: cl_khr_unified_svm
         path: external/opencl-extension-loader
 
     - name: Get SPIR-V Headers