[Toybox] [PATCH] Fix remounting /system on Android.

[enh]

This adds the missing "relatime" option, fixes error handling logic (mount
returns 0/-1, not an errno value, and I at least get EACCES rather than
EROFS in the case where the underlying block device is read-only; we should
also probably only try again if the ioctl actually succeeded), and adds the
missing newline in case where we go around and try again read-only.

The test case was "mount -o rw,remount /system" on Android.
---
 toys/lsb/mount.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)
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