[xray] Add llvm-xray extract support for 32 bit ARM

Summary:
XRay works on 32-bit ARM but extract didn't support it.

See also another previous attempt in D77858.

Reviewers: MaskRay, dberris, johnislarry

Subscribers: kristof.beyls, hiraditya, danielkiss, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D80185