Currently the configuration of the pipeline is such that
there are multiple "optimal" solutions. This is due to
the pipeline making ~lld the default for LLVM, but leaving
+libomptarget from package.py
Since LLVM recipe has a:
conflicts("~lld", "+libomptarget")
clingo is forced to change one of the two defaults, and
the penalty for doing so is the same for each. Hence, it
is random whether we'll get +libomptarget+lld
or ~libomptarget~lld.
This fixes it by changing also the default for libomptarget.