shell32: Add tests for ShellExecute()'s handling of file URLs.

[Juan Lang]

Hi Francois,

pretty sure you didn't mean to leave this hunk in:
@@ -2296,9 +2406,13 @@ START_TEST(shlexec)

     init_test();

+#if 0
     test_argify();
     test_lpFile_parsed();
     test_filename();
+#endif
+    test_fileurl();
+#if 0
     test_find_executable();
     test_lnks();
     test_exes();
@@ -2308,6 +2422,7 @@ START_TEST(shlexec)
     test_commandline();
     test_directory();
     test_trojans();
+#endif

--Juan