Add sycl regression test from @AlexeySachkov 's repo, hopefully sufficient for his request for this test

Author: Erich Keane

sycl/test/regression/unnamed-lambda-split-order.cpp

@@ -0,0 +1,8 @@
+// RUN: %clangxx -fsycl -fsycl-unnamed-lambda %s -o %t.out
+#include <sycl.hpp>
+int main() {
+  auto w = [](auto i) {};
+  sycl::queue q;
+  q.parallel_for(10, [](auto i) {});
+  q.parallel_for(10, w);
+}