win: crashpad_handler should create its own pipe name in ephemeral mode

handler/win/crashy_test_program.cc

Index: handler/win/crashy_test_program.cc
diff --git a/handler/win/crashy_test_program.cc b/handler/win/crashy_test_program.cc
index 7d61c2560ed7fdb57b1bf7817a54d4e43157e4d0..c1d5202666a178f86afd4157d89149ece2e687f3 100644
--- a/handler/win/crashy_test_program.cc
+++ b/handler/win/crashy_test_program.cc
@@ -111,8 +111,8 @@ int CrashyMain(int argc, wchar_t* argv[]) {
       return EXIT_FAILURE;
     }
   } else {
-    fprintf(stderr, "Usage: %s <server_pipe_name>\n", argv[0]);
-    fprintf(stderr, "       %s <handler_path> <database_path>\n", argv[0]);
+    fprintf(stderr, "Usage: %ls <server_pipe_name>\n", argv[0]);
+    fprintf(stderr, "       %ls <handler_path> <database_path>\n", argv[0]);
     return EXIT_FAILURE;
   }