Change CopyNonOverlapping::codegen_ssa
Change CopyNonOverlapping::codegen_ssa

Fixes copy_non_overlapping codegen_ssa to properly handle pointees,
and use bytes instead of elem count

aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust