distutils bbclass: delete site.py*

distutils bbclass: delete site.py*

Multiple recipes package this generated file and will clash during installation with:

| Collected errors:
|  * check_data_file_clashes: Package python-nose wants to install file /build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/work/beaglebone-angstrom-linux-gnueabi/cloud9-gnome-image/1.0-r0/rootfs/usr/lib/python2.7/site-packages/site.pyc
|       But that file is already provided by package  * python-setuptools
|  * check_data_file_clashes: Package python-nose wants to install file /build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/work/beaglebone-angstrom-linux-gnueabi/cloud9-gnome-image/1.0-r0/rootfs/usr/lib/python2.7/site-packages/site.py
|       But that file is already provided by package  * python-setuptools

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Saul Wold <sgw@linux.intel.com>