Make usage of Bitbake's s3 fetcher more flexible with different AWS profiles
and switch between profiles as export of the AWS_PROFILE environment variable
(Bitbake rev: 0f35dc4dfc829fe9c51c239d15567f86c5c14e58)
Signed-off-by: Valentin Danaila <drlv85@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>