Debugger: Fix interrupting code.

- Windows: Always use DebugBreakProcess if Qt Creator is compiled
  64bit. Else always use win64interrupt.exe if Qt Creator
  is a WOW64 application.
- Remove redundant code (procinterrupt/hostutils, gdb adapters).
- Give interruptProcess an errorMessage parameter such that it can
  be used by all C++ engines and a proper error is displayed.
- Improve error messages.
- Build win64interrupt if target architecture is 64 bit (clean tools
  profile, add a profile), borrowing the check from
  qtcreatorcdbext.pro.

Change-Id: I2a6caf98e46051c49c84e1f3aac4c8d2aba66e8b
Reviewed-by: David Schulz <david.schulz@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/debugger/gdb/abstractgdbadapter.cpp

@@ -34,6 +34,7 @@
 #include "gdbengine.h"
 #include "debuggerstartparameters.h"
 #include "abstractgdbprocess.h"
+#include "procinterrupt.h"
 
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
@@ -158,5 +159,21 @@ void AbstractGdbAdapter::handleRemoteSetupFailed(const QString &reason)
     Q_UNUSED(reason);
 }
 
+void AbstractGdbAdapter::interruptLocalInferior(qint64 pid)
+{
+    QTC_ASSERT(state() == InferiorStopRequested, qDebug() << state(); return);
+    if (pid <= 0) {
+        showMessage(QLatin1String("TRYING TO INTERRUPT INFERIOR BEFORE PID WAS OBTAINED"), LogError);
+        return;
+    }
+    QString errorMessage;
+    if (interruptProcess(pid, GdbEngineType, &errorMessage)) {
+        showMessage(QLatin1String("Interrupted ") + QString::number(pid));
+    } else {
+        showMessage(errorMessage, LogError);
+        m_engine->notifyInferiorStopFailed();
+    }
+}
+
 } // namespace Internal
 } // namespace Debugger