test: extend timeouts for ARMv6

[rvagg]

Background: I suspect the ARMv6 timeouts introduced by @silverwind were based on a Pi B+ or similar or perhaps an overclocked Pi. The CI cluster has 2 x original Pi's and 1 x Pi B+ and the tests don't consistently pass on the older Pi's.

This configuration gives me all passes but I'd appreciate review by @silverwind and anyone else familiar with the specific tests I've adjusted: test-child-process-fork-net2.js, test-debug-signal-cluster.js, test-next-tick-error-spin.js

[silverwind]

The x6 factor was already very generous, it surprises me a bit that you still have issues. I suspect your SD must be of a very slow kind or something.

LGTM, if it helps.

[rvagg]

could be .. one of the Pi's particularly has an older SD card. An alternative to raising it to 7 is going through the individual tests that have been failing and extending them rather than doing the whole lot.

[jbergstroem]

I went through ccache statistics on all the PI's. They have a very high hitrate – so getting faster storage would probably be the best solution :/

[silverwind]

If I remember correctly, the RPi doesn't have a dedicated storage controller, so all SD access is done on the CPU, which puts a hard limit on the transfer rate you can get. I'm fine with x7 myself.

[rvagg]

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