[9fans] Go 1.3b1 cmd/pack test takes too long

[Skip Tavakkolian]

is anyone else seeing similar results for cmd/pack?

% go test
PASS
ok   cmd/pack 172.505s

this is on an atom (d525 @ 1.8ghz, 4gb). same test on an arm (quad core a9
@ 1.7ghz, 2gb, linux 3.8) takes much less time:

% go test
PASS
ok      cmd/pack    20.872s