[FIX] core: avoid writting sources during tests

Future runbot improvement may share sources between build,
meaning that sources will be readonly to avoid any interaction.

_touch() was supposed to handle ro filesystem but
f7130556 introduced a new test that was not working
in this case.

Instead of trying to touch file and pseudomocking the result
if the filesystem is readonly, this commit add a real patch
on getmtime.

cherry-pick of b295723c999

closes odoo/odoo#34816

Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

0 files changed, 0 insertions, 0 deletions