Wholesale conversion to #pragma once

Kudos to cgmb and https://github.com/cgmb/guardonce

Change-Id: Ifa8970734b8d43fd08c9260c645bdb0228633791
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/android/androidrunner.h

@@ -23,8 +23,7 @@
 **
 ****************************************************************************/
 
-#ifndef ANDROIDRUNNER_H
-#define ANDROIDRUNNER_H
+#pragma once
 
 #include "androidconfigurations.h"
 #include "androidrunnable.h"
@@ -120,5 +119,3 @@ private:
 
 } // namespace Internal
 } // namespace Android
-
-#endif // ANDROIDRUNNER_H