[Gc] Boehm GC on OpenBSD/x86

[Bruno Haible]

Hi Ivan,

On OpenBSD 4.9/x86, gc-7.2alpha6 fails 2 of 9 tests:

GC_push_all_stacks: sp not set!
Abort trap (core dumped) 
FAIL: gctest

GC_push_all_stacks: sp not set!
Abort trap (core dumped) 
FAIL: threadleaktest

Is it known?

Bruno