[Rakefile] Don't use platform=OS X for -destination option of `xc…

…odebuild`

That can't be used on Xcode 8 (`platform=macOS` should be used instead). So removes `platform=` from `-destination` option and specifies `-sdk` option instead.

Rakefile

@@ -2,20 +2,20 @@
 
 desc 'Build an iOS scheme'
 task :ios, [:scheme, :ios_version, :action] do |_,args|
-  destination = "platform=iOS Simulator,name=iPhone 5,OS=#{args.ios_version}"
-  build("OHHTTPStubs #{args.scheme}", destination, args.action)
+  destination = "name=iPhone 5,OS=#{args.ios_version}"
+  build("OHHTTPStubs #{args.scheme}", "iphonesimulator", destination, args.action)
 end
 
 desc 'Build an OSX scheme'
 task :osx, [:scheme, :arch, :action] do |_,args|
-  destination = "platform=OS X,arch=#{args.arch}"
-  build("OHHTTPStubs #{args.scheme}", destination, args.action)
+  destination = "arch=#{args.arch}"
+  build("OHHTTPStubs #{args.scheme}", "macosx", destination, args.action)
 end
 
 desc 'Build a tvOS scheme'
 task :tvos, [:scheme, :tvos_version, :action] do |_,args|
-  destination = "platform=tvOS Simulator,name=Apple TV 1080p,OS=#{args.tvos_version}"
-  build("OHHTTPStubs #{args.scheme}", destination, args.action)
+  destination = "name=Apple TV 1080p,OS=#{args.tvos_version}"
+  build("OHHTTPStubs #{args.scheme}", "appletvsimulator", destination, args.action)
 end
 
 
@@ -37,10 +37,11 @@ end
 
 
 # Build the xcodebuild command and run it
-def build(scheme, destination, action)
+def build(scheme, sdk, destination, action)
   puts <<-ANNOUNCE
   =============================
   | Action: #{action} 
+  | SDK   : #{sdk}
   | Scheme: "#{scheme}"
   | #{destination}
   =============================
@@ -51,6 +52,7 @@ def build(scheme, destination, action)
     xcodebuild
     -workspace OHHTTPStubs/OHHTTPStubs.xcworkspace
     -scheme "#{scheme}"
+    -sdk #{sdk}
     -configuration Debug
     ONLY_ACTIVE_ARCH=NO
     -destination '#{destination}'