urlmon: Added tests for some of the property methods. Added a dependency to urlmon for oleaut32

[Thomas Mullaly]

Added tests to make sure IUri_GetPropertyBSTR / IUri_GetPropertyDWORD /
IUri_GetPropertyLength handle invalid arguments correctly. Fixed up/added
some comments.

Had to add a dependency to urlmon for oleaut32. This is because the Uri
interface returns all the string properties of a URI as BSTR's and it needs
the SysAllocString/SysFreeString functions in oleau32. I checked on windows
using Dependency Walker and the native version of urlmon has this same
dependency.

Test results:
https://testbot.winehq.org/JobDetails.pl?Key=2109

---
 dlls/urlmon/Makefile.in       |    2 +-
 dlls/urlmon/tests/Makefile.in |    2 +-
 dlls/urlmon/tests/uri.c       |  105
++++++++++++++++++++++++++++++++++++++--
 3 files changed, 101 insertions(+), 8 deletions(-)
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