wperf: add timeout command line option, replace misleading -d
In this patch:
- wperf: add timeout command line option, replace misleading -d
- wperf: add --timeout to README.md
Related to: https://linaro.atlassian.net/browse/WPERF-266
PS: I will try to add in a separate patch support for timed out sampling (this hopefully can be added to 2.5).
Edited by Przemyslaw Wirkus