Adds validate kit to toolchain

Change-Id: I5f10509698a8badafeee2295a16e3c2eb9b20fa7
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/toolchain.cpp

@@ -31,6 +31,7 @@
 
 #include "abi.h"
 #include "toolchainmanager.h"
+#include "task.h"
 
 #include <extensionsystem/pluginmanager.h>
 #include <utils/environment.h>
@@ -190,6 +191,15 @@ bool ToolChain::fromMap(const QVariantMap &data)
     return true;
 }
 
+/*!
+    \brief Used by the toolchainkitinformation to validate the kit.
+*/
+
+QList<Task> ToolChain::validateKit(const Kit */*k*/) const
+{
+    return QList<Task>();
+}
+
 /*!
     \class ProjectExplorer::ToolChainFactory
     \brief Creates toolchains from settings or autodetects them.