[nancy] add perf results for grcinq

input/grid5000/sites/nancy/clusters/grcinq/grcinq.yaml

@@ -10,8 +10,8 @@ nodes:
     processor:
       microarchitecture: Sandy Bridge
     performance:
-      core_flops: 0
-      node_flops: 0
+      core_flops: 11960000000
+      node_flops: 201600000000
     supported_job_types:
       deploy: true
       besteffort: true