Update ClangToTiOS and EarlGreyiOS bots to use iOS10 SDK.

BUG=647996
TBR=smut

Review-Url: https://codereview.chromium.org/2353453003
Cr-Commit-Position: refs/heads/master@{#419442}

ios/build/bots/chromium.fyi/ClangToTiOS.json

@@ -5,7 +5,7 @@
   "comments": [
     "Clang tip-of-tree builder for iOS."
   ],
-  "xcode version": "7.0",
+  "xcode version": "8.0",
   "GYP_DEFINES": [
     "OS=ios",
     "chromium_ios_signing=0",
@@ -28,7 +28,7 @@
   "compiler": "ninja",
   "additional_compile_targets": ["gn_all"],
   "configuration": "Release",
-  "sdk": "iphoneos9.0",
+  "sdk": "iphoneos10.0",
   "tests": [
   ]
 }

ios/build/bots/chromium.fyi/EarlGreyiOS.json

@@ -3,10 +3,10 @@
     "huangml"
   ],
   "comments": [
-    "Tests for 64-bit iOS 9.0 simulators.",
+    "Tests for 64-bit iOS 10.0 simulators.",
     "Tests run on iPhone 5s (64-bit)."
   ],
-  "xcode version": "7.0",
+  "xcode version": "8.0",
   "GYP_DEFINES": [
     "OS=ios",
     "chromium_ios_signing=0",
@@ -25,12 +25,12 @@
   "mb_type": "gn",
   "compiler": "ninja",
   "configuration": "Debug",
-  "sdk": "iphonesimulator9.0",
+  "sdk": "iphonesimulator10.0",
   "tests": [
     {
       "app": "ios_web_shell_test_host",
       "device type": "iPhone 5s",
-      "os": "9.0",
+      "os": "10.0",
       "xctest": true
     }
   ]