Valgrind: Fix coding style issues.

Header specification, remove internal classes from exported
headers, fully qualify signals,slots.

src/plugins/memcheck/memcheckplugin.cpp

@@ -41,8 +41,8 @@
 #include "memchecktool.h"
 #include "memchecksettings.h"
 
-#include <QStringList>
-#include <QtPlugin>
+#include <QtCore/QStringList>
+#include <QtCore/QtPlugin>
 
 using namespace Analyzer;
 using namespace Analyzer::Internal;
@@ -73,4 +73,4 @@ void MemcheckPlugin::extensionsInitialized()
 
 }
 
-Q_EXPORT_PLUGIN(MemcheckPlugin)
+Q_EXPORT_PLUGIN(MemcheckPlugin)