Fix ch12/12.2/12.2.1/12.2.1-21-s

Fix ch12/12.2/12.2.1/12.2.1-21-s

(indirect eval call writing to arguments should not throw type error)

Correctly propagate needsActivation, usesArgumentsObject and strictMode from
the parsed eval code to the ScriptFunction before creating the call context.
Also don't let the qml activation object overwrite an existing one unless
provided.

Change-Id: Ia92e9c40f947cbe09984fca6ecb0d1e03205ff51
Reviewed-by: Lars Knoll <lars.knoll@digia.com>