Add ShellExecute() conformance tests

[Saulius Krasuckas]

* On Fri, 22 Jul 2005, Francois Gouget wrote:
> 
> So the goal of this conformance test is to at least get things started 
> and to test a few sticking points like putting quotes around the

One test fails on my box:

| $ make -C dlls/shell32/tests/ test
| make: Entering directory `/mnt/antras/usr/src/wine-cvs/wine/dlls/shell32/tests'
| ../../../tools/runtest -q -P wine -M shell32.dll -T ../../.. -p shell32_test.exe.so shlexec.c && touch shlexec.ok
| shlexec.c:275: Test failed: ShellExecute(null, "C:\windows\temp\\test_shortcut_shlexec.lnk", null, null) failed: rc=31 err=0
| make: *** [shlexec.ok] Error 1

Any ideas?