cygwin: fix off-by-one in utsname.sysname length#5099

phdye wants to merge 2 commits into

rust-lang:mainrust-lang/libc:mainfrom

phdye-cygwin-rust:cygwin-utsname-sysname-65phdye-cygwin-rust/libc:cygwin-utsname-sysname-65Copy head branch name to clipboard