Some attributes missing on `llvmlite.ir.Function`

[varun-r-mallya]

Feature request

Ability to add attributes such as nofree, nosync, memory(none) to an ir.Function is required as LLVM currently provides this as well.

llvmlite/llvmlite/ir/values.py

Line 884 in 03e2c90

_known = frozenset([