Attribute ARM runtime detection code to Nokia

This code was submitted in the initial ARM NEON patches
(https://sourceforge.net/p/libjpeg-turbo/patches/7/) by Siarhei while he
was still a Nokia employee.

simd/jsimd_arm.c

@@ -2,6 +2,7 @@
  * jsimd_arm.c
  *
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ * Copyright (C) 2011, Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2009-2011, 2013-2014, 2016, D. R. Commander.
  * Copyright (C) 2015-2016, Matthieu Darbois.
  *