Since Buildroot commit [1], the runtime test emulator infra is setting
the emulated system date to the host date.
While this is desired in general, this behaviour is introducing a
variability in the test execution. Depending if the test is executed
during winter or summer time, the output of the command "date +%Z"
will produce a different output.
This commit fixes the issue by setting a fixed date and time on the
emulated system. The date is fixed to Unix Epoch plus one hour. This
is because Linux cannot set the system date to a value less than the
system uptime. So we cannot set the time back to Unix Epoch with the
command "date -s @0" (this would result to a EINVAL Invalid argument).
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/9922589073
https://gitlab.com/buildroot.org/buildroot/-/jobs/9922589081
[1] cf8641b73e
Signed-off-by: Julien Olivain <ju.o@free.fr>