Bring in WebKit r74029 to fix the build with clang.

------------------------------------------------------------------------
r74029 | cwzwarich@webkit.org | 2010-12-14 18:57:14 +0200 (Tue, 14 Dec 2010) | 12 lines

Reviewed by Eric Seidel.

Clang fails to build the JSC interpreter
https://bugs.webkit.org/show_bug.cgi?id=51016



Clang does not allow indirect gotos out of scopes with cleanup. GCC 4.2 allows
them, but it does not correctly generate the cleanup, causing a leak if the
cleanup decrements a reference count.

* interpreter/Interpreter.cpp:
(JSC::Interpreter::privateExecute): Put an Identifier into its own scope.
------------------------------------------------------------------------

Change-Id: Ied16d38431715ef8f1ad9e7d1fae0921500b0ffd
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>