[trac499] Add missing newlines to the end of some files

... which causes Solaris to complain - loudly.

src/lib/asiolink/asiolink.h

@@ -84,4 +84,4 @@
 /// the placeholder of callback handlers:
 /// http://think-async.com/Asio/asio-1.3.1/doc/asio/reference/asio_handler_allocate.html
 
-#endif // __ASIOLINK_H
+#endif // __ASIOLINK_H

src/lib/asiolink/io_address.h

@@ -120,4 +120,4 @@ private:
 };
 
 }      // asiolink
-#endif // __IO_ADDRESS_H
+#endif // __IO_ADDRESS_H

src/lib/asiolink/io_endpoint.h

@@ -115,4 +115,4 @@ public:
 };
 
 }      // asiolink
-#endif // __IO_ENDPOINT_H
+#endif // __IO_ENDPOINT_H

src/lib/asiolink/tests/tcp_socket_unittest.cc

@@ -511,4 +511,4 @@ TEST(TCPSocket, SequenceTest) {
     // Close client and server.
     EXPECT_NO_THROW(client.close());
     EXPECT_NO_THROW(server_socket.close());
-}
+}