Update prebuilt Clang to r346389c.

clang 8.0.7 (based on r346389c) from build 5220042.

Bug: http://b/122549771
Test: N/A
Change-Id: I5af8acdb37718594f4be3fd2097007d9b9583c18
Signed-off-by: Akhil Narang <akhilnarang.1999@gmail.com>
2630 files changed