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

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

-{% from "macros.tmpl" import wrap_with_condition, license -%}
-{{ license() }}
-
-#ifndef RuntimeEnabledFeatures_h
-#define RuntimeEnabledFeatures_h
-
-namespace WebCore {
-
-// A class that stores static enablers for all experimental features.
-
-class RuntimeEnabledFeatures {
-public:
-
-{%- for feature_set in feature_sets %}
-    static void set{{feature_set|capitalize}}FeaturesEnabled(bool);
-{%- endfor %}
-
-{% for feature in features %}
-{%- if feature.custom %}
-    static bool {{feature.first_lowered_name}}Enabled();
-{%- else %}
-{%- if feature.condition %}
-#if ENABLE({{feature.condition}})
-{%- endif %}
-    static void set{{feature.name}}Enabled(bool isEnabled) { is{{feature.name}}Enabled = isEnabled; }
-    static bool {{feature.first_lowered_name}}Enabled() { return {{feature.enabled_condition}}; }
-{%- if feature.condition %}
-#else
-    static void set{{feature.name}}Enabled(bool) { }
-    static bool {{feature.first_lowered_name}}Enabled() { return false; }
-#endif
-{%- endif %}
-{%- endif %}
-{% endfor %}
-
-private:
-    RuntimeEnabledFeatures() { }
-{% for feature in features if not feature.custom %}
-{%- call wrap_with_condition(feature.condition) %}
-    static bool is{{feature.name}}Enabled;
-{%- endcall %}
-{%- endfor %}
-};
-
-} // namespace WebCore
-
-#endif // RuntimeEnabledFeatures_h