Rollup merge of #53116 - jakllsch:netbsd-unsigned-char, r=alexcrichton
Rollup merge of #53116 - jakllsch:netbsd-unsigned-char, r=alexcrichton

NetBSD: fix signedess of char

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