Broken URL in README

[DurvalMenezes]

You may or may not know, or care, but the "Linaro flash memory survey [1]" page at https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey pointed to by this project's README no longer exists (shows a "This page does not exist [...]" page).

You may want (or not) to update it to wherever the page was moved to, or if it was simply deleted, replace it with the last non-broken page saved at the Web Archive: https://web.archive.org/web/20181027222214/https://wiki.linaro.org/WorkingGroups/KernelArchived/Projects/FlashCardSurvey