[SYCL] Fix program_manager test

Fix the program_manager test by adding a dummy kernel. Without it
the test fails on GPU when trying to build a program from "empty"
(metadata only) spv file.

Signed-off-by: Vladimir Lazarev <[email protected]>
Signed-off-by: Sergey Semenov <[email protected]>

Author: sergey-semenov

sycl/test/program_manager/program_manager.cpp

@@ -42,5 +42,8 @@ int main() {
     assert(ClProgramSecond == ClProgramSecondNew);
   }
 
+  queue q;
+  q.submit([&](handler &cgh) { cgh.single_task<class foo>([]() {}); });
+
   return 0;
 }