ntdll: add RtlCreateUserProcess stub (try 2)

[Sebastian Lackner]

On 08.01.2016 05:19, Austin English wrote:
> As I said in the original patch,
> http://www.rohitab.com/discuss/topic/40191-ntcreateuserprocess/.
> Processor Hacker also shows length,
> http://processhacker.sourceforge.net/doc/ntrtl_8h_source.html, as does
> a blog on msdn,
> https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/afdf1b68-1f3e-47f5-94cf-51e397afe073/cygwin-fork-and-rtlcloneuserprocess?forum=windowsgeneraldevelopmentissues.
> Where are you seeing Size?

To mention a couple of examples:

http://undocumented.ntinternals.net/index.html?page=UserMode%2FStructures%2FRTL_USER_PROCESS_INFORMATION.html
http://doxygen.reactos.org/d3/ddd/structRTL__USER__PROCESS__INFORMATION.html
http://www.virtualbox.org/svn/vbox/trunk/include/iprt/nt/nt.h