[Patch, toplevel/config] fix tls.m4 configure race condition (bootstrap/PR43170)

[Paolo Bonzini]

On 06/09/2010 01:06 AM, IainS wrote:
>
> bootstrapped on i686-darwin9, x86_64-darwin10. Confirmed that libgomp
> links emutls, that the tls tests give the same results across
> stage1-3, that the tls-test fragment runs consistently for 10,000
> iterations  and that the testsuites for tls.exp and libgomp run as
> expected.

Ok for trunk and 4.5.

Paolo