[Lazarus] Debugging on macOS

[Zoë Peterson]

Are there still obvious optimizations/improvements to be done with the 
"LLDB with fpdebug" debugger on macOS? We're on trunk and it's largely 
not usable right now.  I'm sure it has something to do with the size of 
our project, but it currently has random, lengthy hangs when doing 
things like single stepping.  If I wait long enough it does eventually 
come back, but it is very much in the range of "Is this hung?" and not 
just sluggish.  It adds 10+ seconds to actually launching the app too, 
which is unpleasant, but at least something I can expect and work around.

-- 
Zoë Peterson
Scooter Software