debugger: allow "Attach to Core" on Windows

Patch by Orgad Shaneh

Task-number: QTCREATORBUG-3813
Change-Id: I7ff88946981ef210bb53e20d7e462055199a30e2
Reviewed-on: http://codereview.qt.nokia.com/332
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/debuggerplugin.cpp

@@ -1917,11 +1917,7 @@ void DebuggerPluginPrivate::setInitialState()
 
     m_startExternalAction->setEnabled(true);
     m_attachExternalAction->setEnabled(true);
-#ifdef Q_OS_WIN
-    m_attachCoreAction->setEnabled(false);
-#else
     m_attachCoreAction->setEnabled(true);
-#endif
     m_startRemoteAction->setEnabled(true);
     m_detachAction->setEnabled(false);