[Offload] Fix CHECK string in llvm-omp-device-info test (#156872)

Author: jplehr

offload/test/tools/llvm-omp-device-info.c

@@ -2,5 +2,5 @@
 //
 // Just check any device was found and something is printed
 //
-// CHECK: Found {{[1-9].*}} devices:
-// CHECK: Device 0:
+// CHECK: Num Devices: {{[1-9].*}}
+// CHECK: [{{[1-9A-Za-z].*}}]