When a function is declared in global scope, the closure is created
by the DeclareGlobals runtime service. It needs a pointer to the
literals array, already allocated in the feedback vector. This
fixes a bug where it's behavior wasn't in sync with CreateClosure,
which accepts the literals from the vector.

This enables a follow-on performance improvement in the CompileLazy
builtin.

BUG=680637

Review-Url: https://codereview.chromium.org/2634283003
Cr-Commit-Position: refs/heads/master@{#42408}