Bump uboot clang version to r510928

Bumping up to the last building version. Next bump
will require some debug. This is an incremental
step to move uboot up to date.

Bug: 369436075
Test: Treehugger
Signed-off-by: Ram Muthiah <rammuthiah@google.com>
Change-Id: I0a1d4b609c2b85ac41fe9fc736eb5edfbec0e829
1 file changed