Merge r9061 to M43.

Original CR: https://webrtc-codereview.appspot.com/48209004/
Fix GetSignatureDigestAlgorithm for openssl to prepare for EC key switch.

TBR=juberti@google.com

BUG=479874

Review URL: https://webrtc-codereview.appspot.com/43309004

Cr-Commit-Position: refs/branch-heads/43@{#8}
Cr-Branched-From: 7351f4689caae2e53b3ee54874546e8aab769d22-refs/heads/master@{#8926}
1 file changed