adding some flaky gms to ignore

TBR=
NOTRY=True
BUG=skia:

Review URL: https://codereview.chromium.org/789963005

expectations/gm/Test-Android-Nexus10-MaliT604-Arm7-Debug/expected-results.json

@@ -4724,6 +4724,7 @@
           12196869759529540877
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "composeshader_565.png": {
@@ -9062,6 +9063,7 @@
           1836535283550760371
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "glyph_pos_n_f_565.png": {
@@ -10459,6 +10461,7 @@
           15496402527902048731
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "imagemagnifier_565.png": {
@@ -16947,4 +16950,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}

expectations/gm/Test-Android-Nexus10-MaliT604-Arm7-Release/expected-results.json

@@ -4108,6 +4108,7 @@
           9799652110156767003
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "complexclip_bw_565.png": {
@@ -4180,6 +4181,7 @@
           2723021135148480001
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "composeshader_565.png": {
@@ -9024,6 +9026,7 @@
           7258621849282010524
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "lcdtextsize_565.png": {
@@ -14110,4 +14113,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}

expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json

@@ -15017,6 +15017,7 @@
           7455993603061352328
         ]
       ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "multipicturedraw_invpathclip_tiled_nvprmsaa4.png": {
@@ -21781,4 +21782,4 @@
       "reviewed-by-human": true
     }
   }
-}
+}