Utils: Fix interrupting local processes on *nix

Change-Id: I6e722379ad62c98d1e8e6d445c1eeea171ff141b
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/libs/utils/processutils.cpp

@@ -10,7 +10,9 @@
 #include <qt_windows.h>
 #else
 #include <errno.h>
+#include <signal.h>
 #include <stdio.h>
+#include <sys/types.h>
 #include <unistd.h>
 #endif
 
@@ -127,7 +129,7 @@ void ProcessHelper::interruptPid(qint64 pid)
 #ifdef Q_OS_WIN
     EnumWindows(sendInterruptMessageToAllWindowsOfProcess_enumWnd, pid);
 #else
-    Q_UNUSED(pid)
+    ::kill(pid, SIGINT);
 #endif
 }
 

src/libs/utils/qtcprocess.cpp

@@ -459,8 +459,7 @@ private:
             m_handle->kill();
             break;
         case ControlSignal::Interrupt:
-            if (m_setup.m_useCtrlCStub) // bypass launcher and interrupt directly
-                ProcessHelper::interruptPid(m_handle->processId());
+            ProcessHelper::interruptPid(m_handle->processId());
             break;
         case ControlSignal::KickOff:
             QTC_CHECK(false);