Rtti.pp unit is not thread safe

Original Reporter info from Mantis: imants_gulbis

• Reporter name: Imants Gulbis

Description:

I attached patch for fixing some problems with using rtti unit in multiple threads.

Specially I got problems with GetParameters, GetDeclaredMethods and GetProperties methods they time to time raised 'A RTTI object with handle 0x%x is already registered' error and sometimes it created more than one TPoolToken for same context which caused problems with GRttiPool

Mantis conversion info:

• Mantis ID: 37302
• Version: 3.3.1