hwclock command fails on read-only-rootfs:
AssertionError: 1 != 0 : Failed to reset RTC time, output: hwclock: cannot open /etc/adjtime: Read-only file system
(From OE-Core rev: 017bf8c160f6ab67d9f8e8d9e30b15bf84f73807)
Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>