Update prebuilt Clang to r416183b1 (12.0.7).

clang 12.0.7 (based on r416183b1) from build 7485623.

Bug: http://b/189328402
Test: N/A
Change-Id: I378644ffa040e2c6f30674ce5173e473d3839010
Merged-In: I378644ffa040e2c6f30674ce5173e473d3839010
(cherry picked from commit 42276f8be3ab82a9a71957ca4943872498bdcdee)
5588 files changed