Update keywords in delphi.js
Update keywords in delphi.js

Added keywords as understood by the latest Free Pascal Compiler which is Delphi compatible.
closes #1285
carlokok/highlight.js,highlightjs/highlight.js,carlokok/highlight.js,isagalaev/highlight.js,Sannis/highlight.js,carlokok/highlight.js,MakeNowJust/highlight.js,palmin/highlight.js,carlokok/highlight.js,palmin/highlight.js,StanislawSwierc/highlight.js,MakeNowJust/highlight.js,palmin/highlight.js,StanislawSwierc/highlight.js,highlightjs/highlight.js,highlightjs/highlight.js,aurusov/highlight.js,MakeNowJust/highlight.js,isagalaev/highlight.js,highlightjs/highlight.js,Sannis/highlight.js,aurusov/highlight.js,aurusov/highlight.js,Sannis/highlight.js