Debugger: DebuggerInterface refactor.

DebuggerInterface:
- Refactor into abstract base class.
- Introduce interface configuration abstract base class.
- Move existing implementation into LocalDebuggerInterface and add
  corresponding configuration class.

Debugger:
- Adjust to instantiate LocalDebuggerInterface.

In and of itself no functional change, but paves the way for further
refactoring to make the debugger fully interface-agnostic (this isn't yet
the case for retrieving target system information such as the team listing,
and creating/attaching to teams).

src/apps/debugger/Debugger.cpp

@@ -23,7 +23,7 @@
 #include "debug_utils.h"
 
 #include "CommandLineUserInterface.h"
-#include "DebuggerInterface.h"
+#include "LocalDebuggerInterface.h"
 #include "GraphicalUserInterface.h"
 #include "ImageDebugLoadingStateHandlerRoster.h"
 #include "MessageCodes.h"
@@ -313,7 +313,7 @@ start_team_debugger(team_id teamID, SettingsManager* settingsManager,
 
 	BReference<DebuggerInterface> interfaceReference;
 	DebuggerInterface* debuggerInterface
-		= new(std::nothrow) DebuggerInterface(teamID);
+		= new(std::nothrow) LocalDebuggerInterface(teamID);
 	if (debuggerInterface == NULL)
 		return NULL;
 	interfaceReference.SetTo(debuggerInterface, true);

src/apps/debugger/Jamfile

@@ -23,6 +23,7 @@ SEARCH_SOURCE += [ FDirName $(SUBDIR) debug_info ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) debug_info loading_state_handlers ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) debug_managers ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) debugger_interface ] ;
+SEARCH_SOURCE += [ FDirName $(SUBDIR) debugger_interface interfaces ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) elf ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) files ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) ids ] ;
@@ -137,6 +138,9 @@ local sources =
 	DebugEvent.cpp
 	DebuggerInterface.cpp
 
+	# debugger_interface/interfaces
+	LocalDebuggerInterface.cpp
+
 	# elf
 	ElfFile.cpp