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[mlir] Add polynomial approximation for math::LogOp (using builders API)

Authored by ezhulenev on Feb 24 2021, 6:59 AM.

Description

[mlir] Add polynomial approximation for math::LogOp (using builders API)

Replace math::LogOp with an approximations from the the Julien Pommier's SSE math library

Link: http://gruntthepeon.free.fr/ssemath

Reviewed By: asaadaldien

Differential Revision: https://reviews.llvm.org/D97304