solarish: Restrict openpty and forkpty polyfills to illumos, replace Solaris implementation with FFI#4329

tgross35 merged 1 commit intorust-lang:mainrust-lang/libc:mainfrom

yuvraj-wale:remove-solarish-compat-openpty-forkptyyuvraj-wale/libc:remove-solarish-compat-openpty-forkptyCopy head branch name to clipboard