lit.cfg passes agility_sdk as a path through to the taef test

Author: damyanp

tools/clang/test/taef_exec/lit.cfg

@@ -69,6 +69,9 @@ if config.unsupported == False:
   if agility_sdk:
     extra_params.append('/p:')
     extra_params.append('D3D12SDKVersion=1')
+    extra_params.append('/p:')
+    extra_params.append('D3D12SDKPath=' + agility_sdk)
+    print(f"Using Agility SDK from {agility_sdk}")
 
   warp_dll = getattr(config, 'warp_dll', None)
   if warp_dll: