Fix iOS64 Release internal bot.

iOS version was changed to 11.2.1.

TBR=phoglund@webrtc.org

Bug: None
No-Try: true
Change-Id: I7c4d77d7727afa4b59a2010fbfbed70b80c5cc60
Reviewed-on: https://webrtc-review.googlesource.com/36720
Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21458}

tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json

diff --git a/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json b/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
index 3348039..89e60ea 100644
--- a/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
+++ b/tools_webrtc/ios/internal.client.webrtc/iOS64_Release.json
@@ -23,7 +23,7 @@
     {
       "include": "real_device_tests.json",
       "device type": "iPhone 7",
-      "os": "11.0"
+      "os": "11.2.1"
     }
   ],
   "expiration_time": 3600

tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json

diff --git a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
index 3348039..89e60ea 100644
--- a/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
+++ b/tools_webrtc/ios/internal.tryserver.webrtc/ios_arm64_rel.json
@@ -23,7 +23,7 @@
     {
       "include": "real_device_tests.json",
       "device type": "iPhone 7",
-      "os": "11.0"
+      "os": "11.2.1"
     }
   ],
   "expiration_time": 3600