[Lazarus] Need Testers: parallel compilation

[Mattias Gaertner]

Hi,

The IDE and lazbuild now compile packages in parallel. Each package is
still compiled with one call of fpc (single threaded).

You can set the maximum number of parallel processes in Tools /
Options / Messages Window. By default it tries to guess the amount of
cpu cores with the function GetSystemThreadCount in unit UTF8Process.

Mattias