GIT_SILENT Explicitly add `using namespace Plasma` statement for runners

With the changes in KRunner, we now need to explicitly add that.

runners/kwin/kwin-runner.h

@@ -10,6 +10,8 @@
 
 #include <krunner/abstractrunner.h>
 
+using namespace Plasma;
+
 class KWinRunner : public AbstractRunner
 {
     Q_OBJECT

runners/plasma-desktop/plasma-desktop-runner.h

@@ -9,6 +9,8 @@
 
 #include <krunner/abstractrunner.h>
 
+using namespace Plasma;
+
 /**
  * This class runs programs using the literal name of the binary, much as one
  * would use at a shell prompt.