[testsuite, build] Convert boehm-gc testsuite to DejaGnu (PR boehm-gc/11412)

[Mike Stump]

On Mar 21, 2011, at 11:33 AM, Paolo Bonzini wrote:
>> So, this still seems unportable to me?
> 
> These are libtool options.

Ah, that's the part I was missing...  Thanks.