Update python-llvmlite to 0.31.0

Summary:
The updated package It's required as a runtime dep of python-numba.

Signed-off-by: Martin Reboredo <gc1000ll@gmail.com>

Test Plan: Run the examples from the numba documentation.

Reviewers: Triage Team, DataDrake

Reviewed By: Triage Team, DataDrake

Subscribers: DataDrake

Differential Revision: https://dev.getsol.us/D8004