Ensure that all GNU-based systems are considered to be UNIX
Ensure that all GNU-based systems are considered to be UNIX

Original Mozilla bug: https://bugzilla.mozilla.org/show_bug.cgi?id=749533

R=reed1
BUG=
TEST=

Review URL: https://codereview.appspot.com/6419057

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@4763 2bbb7eff-a529-9590-31e7-b0007b416f81

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