Fix pre-commit to use clang 5.0 (#1222)
Fix pre-commit to use clang 5.0 (#1222)

Automatic merge from submit-queue.

Fix pre-commit to use clang 5.0

**What this PR does / why we need it**:
Missed from #1218 

**Release note**:
```release-note
N/A
```
lizan/proxy,istio/proxy,lizan/proxy,istio/proxy,lizan/proxy,istio/proxy,lizan/proxy,istio/proxy