Update prebuilt Clang to r353983d.

clang 9.0.4 (based on r353983d) from build 5657785.

Bug: http://b/131714073
Test: N/A
Change-Id: Ic6b449218407f46125e8aaab8d333f163e75a4dc
Signed-off-by: Akhil Narang <akhilnarang.1999@gmail.com>
2708 files changed