net: increase timeout in TestWriteTimeoutFluctuation on darwin/arm
On darwin/arm, the test sometimes fails with:
Process 557 resuming
--- FAIL: TestWriteTimeoutFluctuation (1.64s)
timeout_test.go:706: Write took over 1s; expected 0.1s
FAIL
Process 557 exited with status = 1 (0x00000001)
go_darwin_arm_exec: timeout running tests
This change increaes timeout on iOS builders from 1s to 3s as a
temporarily fix.
Updates #10775.
Change-Id: Ifdaf99cf5b8582c1a636a0f7d5cc66bb276efd72
Reviewed-on: https://go-review.googlesource.com/9915 Reviewed-by: Minux Ma <minux@golang.org>