[ios] Update ToTiOSDevice to match device @ iOS 11.4.

Bug: 856516
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I52bee9bcd13d835eab5592bee12c48b95c25c233
Reviewed-on: https://chromium-review.googlesource.com/1197923Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587856}

ios/build/bots/chromium.clang/ToTiOSDevice.json

@@ -38,104 +38,87 @@
     {
       "app": "base_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "boringssl_crypto_tests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "boringssl_ssl_tests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "components_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "crypto_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "gfx_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "google_apis_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ios_chrome_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ios_net_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ios_web_inttests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ios_web_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ios_web_view_inttests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "net_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "skia_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "sql_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "ui_base_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     },
     {
       "app": "url_unittests",
       "device type": "iPhone 6s",
-      "xcode build version": "9C40b",
-      "os": "10.2"
+      "os": "11.4"
     }
   ],
   "expiration_time": 10800