time: only use packed struct on x86*
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
time: only use packed struct on x86*
[Bug #9558] non-x86 cannot safely access unaligned addresses
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45165 b2dd03c8-39d4-4d8f-98ff-823fe69b080e