FpDebugger (pure): Let the memory-manager read memory from within the debugging-thread on Linux.
More fixes for getting the instruction-register on x86_64
Fixxed setting the line-info on Darwin and Linux

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45817 4005530d-fff6-0310-9dd1-cebe43e6787f