fix python path on windows

Signed-off-by: Nathan Gauër <[email protected]>

Author: Keenuts

llvm/test/Other/spirv-sim/lit.local.cfg

@@ -1,2 +1,8 @@
 spirv_sim_root = os.path.join(config.llvm_src_root, "utils", "spirv-sim")
-config.substitutions.append(("spirv-sim", os.path.join(spirv_sim_root, "spirv-sim.py")))
+config.substitutions.append(
+  (
+    "spirv-sim",
+    "'%s' %s"
+    % (config.python_executable, os.path.join(spirv_sim_root, "spirv-sim.py")),
+  )
+)