Roll clang 346388-1:346388-5.

Ran `tools/clang/scripts/upload_revision.py 346388 5`.

Bug: 870331
Change-Id: Id09c926a34194487757e641283f63fb63a614436
Reviewed-on: https://chromium-review.googlesource.com/c/1351029
Commit-Queue: Hans Wennborg <hans@chromium.org>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611214}

tools/clang/scripts/update.py

@@ -35,7 +35,7 @@ if use_head_revision:
   CLANG_REVISION = 'HEAD'
 
 # This is incremented when pushing a new build of Clang at the same revision.
-CLANG_SUB_REVISION=1
+CLANG_SUB_REVISION=5
 
 PACKAGE_VERSION = "%s-%s" % (CLANG_REVISION, CLANG_SUB_REVISION)