Auto merge of #128158 - workingjubilee:unsafe-wrap-personality-gcc, r=<try>

std: unsafe-wrap personality::gcc

Nothing seems obviously wrong with these implementations except for some unanswered questions. Admittedly, I don't want to burn excessive time on exceptional exception handlers. Thus this is mostly a brute-force syntactic wrapping and some comments where they seemed correct, creating another largely whitespace diff.

try-job: armhf-gnu

Author: bors