lib/mbedtls: Switch to currently latest commit of LTS branch v2.16.

From a version numbering point of view this is a downgrade (2.17.0 ->
2.16.x).  However the latest commit for version 2.17.0 is from March 2019
and no further minor release happened after 2.17.0.  This version is EOL.
2.16.x though is still actively maintained as a long term release, hence
security and stability fixes are still being backported, including
compatibility with upcoming compiler releases.
This commit is contained in:
Mirko Vogt
2021-02-09 18:28:36 +00:00
committed by Damien George
parent c33c749f64
commit 7d73b9ff99