Insert explicit deoptimization for named loads that have "uninitialized" type feedback.

Insert explicit deoptimization for named loads that have "uninitialized" type feedback.

We already do this for binary-ops, unary-ops and comparisons. Typefeedback for named loads can now also
be in "uninitialized" state which means that the corresponding load IC was never executed.
Committed: https://code.google.com/p/v8/source/detail?r=11087

[Jakob Kummerow, 2012-03-19 15:49:22]

LGTM