[Ecls-list] Freeze import.c which is threads examples source

[Matthew Mondor]

Kenichi Satoh wrote:

> Thanks for your advice.
> I have tried with ECL 10.7.1(CVS HEAD) , however  that problem still persist.
> I also tried to compile with configure option --with-__thread=no, but
> have same problem.

Hmm since the backtrace seems to show the gc is involved, when the test
succeeded here it was using boehm-gc 7.1 (ECL configure has
--enable-boehm=auto by default which will link against an already
installed gc library if found, or revert to the included one otherwise,
I think).
-- 
Matt