GNUstep Travis

[Fred Kiefer]

Currently our build tests for GNUstep base and gut are broken. This render the 
automatic validation of pull requests useless. I am rather sure that the issue 
is again not in base but rather in changes build requirements of libobjc2, 
caused by a change in GNUstep make or that strange linker problem that 
everybody is seeing. 


David and Niels could you please have a looking into this? The most important 
information would be if the setup of the two failing cases is still possible 
with current libobjc2. If not we should decide whether to drop these cases or 
use an old version of libobjc2 for them.

Fred