FpDbg: Replace writeln with debugln

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42847 4005530d-fff6-0310-9dd1-cebe43e6787f
FpDbg: Replace writeln with debugln

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42848 4005530d-fff6-0310-9dd1-cebe43e6787f