Add TInterlocked class from Delphi

Original Reporter info from Mantis: urhen

• Reporter name: NoName

Description:

Needed for Delphi and easier/cleaner than using InterLockedIncrement/InterlockedCompareExchange/etc functions.

http://docwiki.embarcadero.com/Libraries/Rio/en/System.SyncObjs.TInterlocked

Mantis conversion info:

• Mantis ID: 37089
• Version: 3.3.1
• Monitored by: » @Bi0T1N (Bi0T1N)