external/boringssl: Sync to ea52ec98a56a40879b37493f3d1da1a1679e1fba.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/21baf6421a7e1e03f85cf2243c3c2404f5765072..ea52ec98a56a40879b37493f3d1da1a1679e1fba

Test: BoringSSL CTS Presubmits.
Change-Id: I6ebeb5f2aa7daa462c9d8933d9d5388011054fac
68 files changed