undefined symbols in AddressSanitizer tests on darwin

At 167457 on x86_64-apple-darwin12, I am seeing a slew of AddressSanitizer failures due to
unresolved symbols such as...

Exit Code: 1
Command Output (stderr):

The fix is under review.


Fix is in (r167460).

Fix is in (r167460).

Confirmed that the regressions are gone at r167464 on x86_64-apple-darwin12.