linux/mac bots fail on 64-bit run-pass/bind-native-printf

[brson]

http://67.23.44.229/logs/2011/10/30/2011-11-30T19:28:06Z-b5dfb73e-bf33-45bf-bfd2-4da8cce1d4c3.html

[brson]

This usage of printf seems dubious on x86_64

[brson]

This test cases isn't about variadic arguments at all, so we can just pick a different native to use.

[nikomatsakis]

I have a fix for this, just haven't pushed it yet (pending try build).

[nikomatsakis]

Fixed in @fdebd1e2ef440312ac791d505af7dd089efa2499

[nikomatsakis]

Pushed.