[llvm] [X86] Added sincos vector lib codegen test coverage (PR #183702)

[Aadarsh Keshri via llvm-commits]

Aadarsh-Keshri wrote:

@RKSimon I changed the `-mtriple` parameter and it worked!! :
; RUN: llc -mtriple=x86_64-apple-macosx10.15 -vector-library=AMDLIBM < %s | FileCheck %s

https://github.com/llvm/llvm-project/pull/183702