Update prebuilt Clang to build 3859424.

Built from version 4.0.285906.

Bug: http://b/36442361

(cherry picked from commit 7b81e9ef236c6baa9bc9fe65394135957a80e919)

Change-Id: I04fa085073d3eb6e1734e0840074e31d1a8e0fad
227 files changed