Clean headers in ProjectExplorer.

Change-Id: If61a8a91d2a39c5c97974a5bfcef91892b68d3f1
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/projectexplorer/toolchain.cpp

@@ -30,11 +30,11 @@
 #include "toolchain.h"
 
 #include "abi.h"
+#include "headerpath.h"
 #include "toolchainmanager.h"
 #include "task.h"
 
-#include <extensionsystem/pluginmanager.h>
-#include <utils/environment.h>
+#include <utils/fileutils.h>
 
 #include <QCoreApplication>
 #include <QUuid>
@@ -124,6 +124,11 @@ QString ToolChain::id() const
     return d->m_id;
 }
 
+QList<Utils::FileName> ToolChain::suggestedMkspecList() const
+{
+    return QList<Utils::FileName>();
+}
+
 Utils::FileName ToolChain::suggestedDebugger() const
 {
     return ToolChainManager::instance()->defaultDebugger(targetAbi());