scripts/oe-selftest: Use site.USER_SITE to run coverage configuration code for sub-process
Coverage in oe-selftest currently requires to create or modify
a sitecustomize.py file according the coverage tool setup instructions
(http://coverage.readthedocs.org/). This file has to be located in
the system's python folder, which is not a good solution since this
folder is not accesible to non-privileged users.
The best solution so far is to create this file in the home directory.
This is implemented by creating the temporal file in the user site
default folder.
[Yocto #8930]
Signed-off-by: Humberto Ibarra <humberto.ibarra.lopez@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
