debugger: re-enable interrupting in remote setups

Change-Id: I6d4503ec78e3ce590691dde69992a1599b506fc5
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>
(cherry picked from commit 0e8657107c)
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/debugger/gdb/remotegdbprocess.cpp

@@ -237,6 +237,11 @@ void RemoteGdbProcess::kill()
     }
 }
 
+bool RemoteGdbProcess::interrupt()
+{
+    return false;
+}
+
 void RemoteGdbProcess::interruptInferior()
 {
     QTC_ASSERT(m_state == RunningGdb, return);