Revert "Cleanup: Initializers come before member methods (swiftlang#488)"

This reverts commit 4fb6ca2.

Author: ktoso

Samples/SwiftJavaExtractJNISampleApp/Sources/MySwiftLibrary/ConcreteProtocolAB.swift

@@ -17,16 +17,16 @@ public class ConcreteProtocolAB: ProtocolA, ProtocolB {
   public let constantB: Int64
   public var mutable: Int64 = 0
 
-  public init(constantA: Int64, constantB: Int64) {
-    self.constantA = constantA
-    self.constantB = constantB
-  }
-
   public func name() -> String {
     return "ConcreteProtocolAB"
   }
 
   public func makeClass() -> MySwiftClass {
     return MySwiftClass(x: 10, y: 50)
   }
+
+  public init(constantA: Int64, constantB: Int64) {
+    self.constantA = constantA
+    self.constantB = constantB
+  }
 }