[Feature](mlu-ops): update cnnl to 2.2.6 (Cambricon#1307)

Author: duzekunKTH

build.property

@@ -2,7 +2,7 @@
   "version": "1.10.0-1",
   "python": "3.6.0",
   "build_requires": {"cntoolkit": ["release","4.6.1-1"],
-                     "cnnl":["release","2.2.1-1"],
+                     "cnnl":["release","2.2.6-1"],
                      "driver": "6.0.3",
                      "eigen3": "3.4.0",
                      "libxml2": "2.9.13",