Use _OverrideLog.h instead of OverrideLog.h

This is a temporary hack to prevent the ordering. This is needed because
OverrideLog.h needs to be included first and clang-format would change
the order.

Test: compiles
Change-Id: Ide07e814e7e1be8d7d8a89f634d855938ed5adab
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>