Maybe fixes BrainScaleS software (oppulance untouched) for spack v0.20.0…

The compiler looks the same, but it behaves differently in this new spack deployment.

There are a lot of missing #includes for previously-transient includes… let's fix those and hope for a fixed build.

packages/hxtorch/package.py

@@ -155,7 +155,7 @@ class Hxtorch(WafPackage):
         return args
 
     def build_test(self):
-        self.waf('build', '--test-execall')
+        self.builder.waf('build', '--test-execall')
 
     def install_args(self):
         args = ['--test-execnone']