Fix sharing of literal boilerplates for optimized code.

Fix sharing of literal boilerplates for optimized code.

This makes sure the literal boilerplates array is correctly shared
together with optimized code when caching of optimized code is enabled.
It also enabled said caching by default again.

R=ulan@chromium.org
BUG=v8:2193
TEST=mjsunit/regress/regress-2193

Committed: https://code.google.com/p/v8/source/detail?r=11911

[ulan, 2012-06-22 13:35:44]

LGTM