[clang] [libc][libm][GPU] Added missing vendor entry points to `libm` for GPUs (PR #66031)

[Anton Rydahl via cfe-commits]

Valentin Clement =?utf-8?b?KOODkOODrOODsw=?=,
Valentin Clement =?utf-8?b?KOODkOODrOODsw=?=,MaheshRavishankar
 <1663364+MaheshRavishankar at users.noreply.github.com>,Fangrui Song
 <i at maskray.me>,Razvan Lupusoru <razvan.lupusoru at gmail.com>,Walter Erquinigo
 <a20012251 at gmail.com>,"Yaxun (Sam) Liu" <yaxun.liu at amd.com>,Nico Weber
 <thakis at chromium.org>,Stella Laurenzo <stellaraccident at gmail.com>,Lang Hames
 <lhames at gmail.com>,Matthias Braun <matze at braunis.de>,Arthur Eubanks
 <aeubanks at google.com>,Nico Weber <thakis at chromium.org>,
Valentin Clement =?utf-8?b?KOODkOODrOODsw=?=,Vitaly Buka
 <vitalybuka at google.com>,Vitaly Buka <vitalybuka at google.com>,Fangrui Song
 <i at maskray.me>,Fangrui Song <i at maskray.me>,Fangrui Song <i at maskray.me>,Fangrui
 Song <i at maskray.me>,erichkeane <ekeane at nvidia.com>,Amir Ayupov
 <aaupov at fb.com>,Amir Ayupov <aaupov at meta.com>,yinying-lisa-li
 <107574043+yinying-lisa-li at users.noreply.github.com>,Christopher Di Bella
 <cjdb.ns at gmail.com>,Konstantin Varlamov <varconsteq at gmail.com>,Alexey Bader
 <alexey.bader at intel.com>,Vitaly Buka <vitalybuka at google.com>


https://github.com/AntonRydahl closed https://github.com/llvm/llvm-project/pull/66031