etc.c: Etc.uname on Windows
ComputerNameDnsHostname
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
etc.c: Etc.uname on Windows
GetVersionExW(), GetSystemInfo(), and GetComputerNameExW() with
ComputerNameDnsHostname
. [Feature #9842]git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e