Track libcore commit 6c5284cca0ec8cf20dd6c5e9b2b6254d813e9d24.

Includes generated changes for test-current.txt.

bug: 27426688

(cherry picked from commit de33c660df4a6ff8a138e3033c9e1d446bd6b570)

Change-Id: Idd323fe7458a2b124aae0009b4de83039e2ade21
3 files changed