devtools: add recreate_db.sh
devtools: add recreate_db.sh

A script is added which deletes all local databases and creates a new one.

Change-Id: Ifd887140b7a7127244d774c243c7970a90b7735b
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/333373
Trust: Julie Qiu <8d32267b6b4884cf35adeaccde2b6857ae11aace@golang.org>
Run-TryBot: Julie Qiu <8d32267b6b4884cf35adeaccde2b6857ae11aace@golang.org>
TryBot-Result: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite