General Xcode 11 support for picking iOS simulators to test against.

objectivec/DevTools/full_mac_build.sh

@@ -289,10 +289,10 @@ if [[ "${DO_XCODE_IOS_TESTS}" == "yes" ]] ; then
           -disable-concurrent-destination-testing
       )
       ;;
-    11.0* )
+    11.*)
       XCODEBUILD_TEST_BASE_IOS+=(
           -destination "platform=iOS Simulator,name=iPhone 4s,OS=8.1" # 32bit
-          -destination "platform=iOS Simulator,name=iPhone 7,OS=latest" # 64bit
+          -destination "platform=iOS Simulator,name=iPhone 8,OS=latest" # 64bit
           # 10.x also seems to often fail running destinations in parallel (with
           # 32bit one include atleast)
           -disable-concurrent-destination-testing