Reason for revert:
Original CL was reverted, https://codereview.chromium.org/2597163002

Original issue's description:
> PPC/s390: [TypeFeedbackVector] Root literal arrays in function literals slots
>
> Port 93df0940
>
> Original Commit Message:
>
>     Literal arrays and feedback vectors for a function can be garbage
>     collected if we don't have a rooted closure for the function, which
>     happens often. It's expensive to come back from this (recreating
>     boilerplates and gathering feedback again), and the cost is
>     disproportionate if the function was inlined into optimized code.
>
>     To guard against losing these arrays when we need them, we'll now
>     create literal arrays when creating the feedback vector for the outer
>     closure, and root them strongly in that vector.
>
> R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
> BUG=v8:5456
> LOG=N
>
> Review-Url: https://codereview.chromium.org/2592043003
> Cr-Commit-Position: refs/heads/master@{#41898}
> Committed: https://chromium.googlesource.com/v8/v8/+/19aa7a20b0c39ea9ef81d6e021863183732f82c0

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:5456
LOG=N

Review-Url: https://codereview.chromium.org/2601793002
Cr-Commit-Position: refs/heads/master@{#41966}