This provides the Arm Optimized Routines (see https://github.com/ARM-software/optimized-routines) source code under the LLVM license.
This patch is not intended to be committed as is.
Instead, the intent is to make it very clear that Arm is offering this source code under the LLVM license, to be picked up by anyone in the LLVM community with an interest to integrate this code well within LLVM libc.
The version of the code provided in this patch is v20.02 of the Arm Optimized Routines project.