Update include/alpaka/math/abs/AbsCudaBuiltIn.hpp
Update include/alpaka/math/abs/AbsCudaBuiltIn.hpp

Included commit suggestion from Axel Huebl

Co-Authored-By: Axel Huebl <02c4e323bbd7725166599555105b52ee0948d12d@plasma.ninja>
BenjaminW3/alpaka,BenjaminW3/alpaka