Add an easy way to test the debug_server crash window.

It's quite annoying to install the new debug_server and test with a
crashing app everytime. So add a DebugWindow app that just shows the
debug window and returns the result.

Change-Id: I7238057a508871ce3fffc493cb73126eb852d99e
Reviewed-on: https://review.haiku-os.org/c/1460
Reviewed-by: waddlesplash <[email protected]>

src/tests/servers/debug/DebugWindowTest.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2019, Adrien Destugues <[email protected]>
+ * Distributed under terms of the MIT license.
+ */
+
+#include "DebugWindow.h"
+
+#include <Application.h>
+
+
+int main(void)
+{
+	BApplication app("application/x-vnd.haiku-debugwindowtest");
+	DebugWindow* window = new DebugWindow("test");
+	return window->Go();
+}

src/tests/servers/debug/Jamfile

@@ -2,4 +2,14 @@ SubDir HAIKU_TOP src tests servers debug ;
 
 AddSubDirSupportedPlatforms libbe_test ;
 
+UseHeaders [ FDirName $(HAIKU_TOP) src servers debug ] ;
+UsePrivateHeaders shared ;
+
 BinCommand crashing_app : crashing_app.cpp ;
+
+SEARCH_SOURCE += [ FDirName $(HAIKU_TOP) src servers debug ] ;
+SimpleTest DebugWindow :
+	DebugWindow.cpp DebugWindowTest.cpp 
+	: be localestub shared
+	: debug_server.rdef
+;