doc:it_IT: translation for kernel-hacking

This patch includes the kernel-hacking translation in Italian (both
hacking.rst and locking.rst).

It adds also the anchors for the english kernel-hacking documents.
Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/kernel-hacking/hacking.rst

+.. _kernel_hacking_hack:
+
 ============================================
 Unreliable Guide To Hacking The Linux Kernel
 ============================================

Documentation/kernel-hacking/locking.rst

+.. _kernel_hacking_lock:
+
 ===========================
 Unreliable Guide To Locking
 ===========================

Documentation/translations/it_IT/index.rst

@@ -87,6 +87,7 @@ vostre modifiche molto più semplice
    :maxdepth: 2
 
    doc-guide/index
+   kernel-hacking/index
 
 .. warning::
 

Documentation/translations/it_IT/kernel-hacking/index.rst

+.. include:: ../disclaimer-ita.rst
+
+:Original: :ref:`Documentation/kernel-hacking/index.rst <kernel_hacking>`
+:Translator: Federico Vaga <federico.vaga@vaga.pv.it>
+
+.. _it_kernel_hacking:
+
+============================
+Guida all'hacking del kernel
+============================
+
+.. toctree::
+   :maxdepth: 2
+
+   hacking
+   locking