Bug#1089212: gnome-control-center:FTBFS:build failure on riscv (test-network-panel test timeout)

[Yue Gui]

Hi,
about
https://salsa.debian.org/gnome-team/gnome-control-center/-/merge_requests/52
Perhaps, doubling the test timeout threshold specifically for RISC-V might
be a better choice.

Regards
Gui-Yue