Add PGI workaround for Daint/Dom tests

Author: kraushm

cscs-checks/microbenchmarks/mpi/halo_exchange/halo_cell_exchange.py

@@ -93,3 +93,12 @@ def __init__(self):
 
         self.maintainers = ['AJ']
         self.tags = {'benchmark'}
+
+    @rfm.run_before('compile')
+    def pgi_workaround(self):
+        if self.current_system.name in ['daint', 'dom']:
+            if self.current_environ.name == 'PrgEnv-pgi':
+                self.variables = {
+                        'CUDA_HOME': '$CUDATOOLKIT_HOME',
+                }
+