jbfitb

Adds rewind function to allow curl seek and retry sending data to server

1

**Issue** - https://github.com/alexa/avs-device-sdk/issues/1526 - About 1 in 10 Alexa requests fail on mobile devices. - Requests generally fail with one of two errors: [curl error code 56](https://curl.haxx.se/libcurl/c/libcurl-errors.html#CURLERECVERROR) which is "receive...