create tempdir so we do not rely on git doing it
create tempdir so we do not rely on git doing it

Seems like git on windows does not want to do it, so we do instead.

sjn/panda,nbrown/panda,masak/panda,masak/panda,tadzik/panda,hoelzro/panda,dwarring/panda,skaji/panda,tadzik/panda,tadzik/panda,timo/panda,nbrown/panda,will-crawford/panda,stmuk/panda,TimToady/panda,will-crawford/panda,laben/panda,niner/panda,raydiak/panda,timo/panda,stmuk/panda,dwarring/panda,sjn/panda,jonathanstowe/panda,niner/panda,perlpilot/panda,moznion/panda,moznion/panda,hoelzro/panda,dwarring/panda,skaji/panda,jonathanstowe/panda,sjn/panda,shoichikaji/panda,perlpilot/panda,TimToady/panda,hoelzro/panda,shoichikaji/panda,cygx/panda,laben/panda,raydiak/panda,cygx/panda