Move core/scripts to build/scripts so that platform can use them.

Source/core/scripts/templates/InternalRuntimeFlags.h.tmpl

-{% from "macros.tmpl" import wrap_with_condition, license -%}
-{{ license() }}
-
-#ifndef InternalRuntimeFlags_h
-#define InternalRuntimeFlags_h
-
-#include "RuntimeEnabledFeatures.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-#include "wtf/RefCounted.h"
-
-namespace WebCore {
-
-class InternalRuntimeFlags : public RefCounted<InternalRuntimeFlags> {
-public:
-    static PassRefPtr<InternalRuntimeFlags> create()
-    {
-        return adoptRef(new InternalRuntimeFlags);
-    }
-
-{#-
-    Setting after startup does not work for most runtime flags, but we
-    could add an option to print setters for ones which do:
-    void set{{feature.name}}Enabled(bool isEnabled) { RuntimeEnabledFeatures::set{{feature.name}}Enabled(isEnabled); }
-    If we do that, we also need to respect Internals::resetToConsistentState.
-#}
-{% for feature in features if not feature.custom %}
-{%- call wrap_with_condition(feature.condition) %}
-    bool {{feature.first_lowered_name}}Enabled() { return RuntimeEnabledFeatures::{{feature.first_lowered_name}}Enabled(); }
-{%- endcall %}
-{% endfor %}
-
-private:
-    InternalRuntimeFlags() { }
-};
-
-} // namespace WebCore
-
-#endif // InternalRuntimeFlags_h