JIT code cache: Don't set footprint limit for data portion.

We use code footprint limit to trigger GCs,
but we don't need it for data.

The mspace algorithm still only uses as few pages as possible.
(otherwise we would have been wasting memory as it is now)

This stops the AllocateData() from unexpectedly failing.

Test: test.py -b --host --jit
Bug: 119800099
Change-Id: I5e59c9acf335d39d733592d0666f5e987136d883
2 files changed