[libc][math] Tracking Issue - Refactor `log1p` Math Functions to Header Only.

[bassiounix]

This is tracking issue to refactor log1p math functions in single and double precision currently implemented in LLVM libc to be header-only.

[llvmbot]

@llvm/issue-subscribers-libc

Author: Muhammad Bassiouni (bassiounix)

Details

This is tracking issue to refactor `log1p` math functions in single and double precision currently implemented in LLVM libc to be header-only.