external/boringssl: Sync to df11bed9ee05141b54da7b88cc5b7960ca858164.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/fdb48f98612e934eab339b4871484b1c987553e2..df11bed9ee05141b54da7b88cc5b7960ca858164

Test: atest CtsLibcoreTestCases
Change-Id: Ief8a63d8e53d6aec8e146ad9203e20f484be6d54
27 files changed