increase max stdin size
increase max stdin size

Change-Id: I34745cd64d250cda8ef29f1a81eea6f7c6815115
Reviewed-on: https://gerrit.instructure.com/61835
Reviewed-by: Zach Wily <9de8c4480303b5335cd2a33eefe814615ba3612a@instructure.com>
Tested-by: Jenkins

instructure/straitjacket,dented42/straitjacket,instructure/straitjacket,dented42/straitjacket,dented42/straitjacket,instructure/straitjacket,seanhess/straitjacket,instructure/straitjacket,seanhess/straitjacket,instructure/straitjacket,instructure/straitjacket,instructure/straitjacket,seanhess/straitjacket,dented42/straitjacket,dented42/straitjacket,dented42/straitjacket,seanhess/straitjacket,instructure/straitjacket,instructure/straitjacket,seanhess/straitjacket,seanhess/straitjacket,dented42/straitjacket