Fix race condition when createdump tries to read /proc/pid/mem before prctl(PR_SET_PTRACER, childpid) is set#120000

hoyosjs merged 6 commits intodotnet:maindotnet/runtime:mainfrom

allantargino:fix-prctl-race-condition-unixallantargino/dotnet-runtime:fix-prctl-race-condition-unixCopy head branch name to clipboard