Update Kokoro's clang-format to version 10

Note the .clang-format config file is now incompatible with clang-format
version 8 due to the use of AfterCaseLabel, which is necessary to match
the current formatting.

Also add amaiorano@google.com as a project owner.

Bug: b/144825072
Change-Id: Ifd8ceae65245f0bc12143095ab5336f177f4a78f
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/43451
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>

README.md

diff --git a/README.md b/README.md
index a53dced..fb8dd1b 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,10 @@
 

     git push origin HEAD:refs/for/master

 

+When ready, [add](https://gerrit-review.googlesource.com/Documentation/intro-user.html#adding-reviewers) a project [owner](OWNERS) as a reviewer on your change.

+

+Some tests will automatically be run against the change. Notably, [presubmit.sh](tests/presubmit.sh) verifies the change has been formatted using [clang-format 10.0](tests/kokoro/gcp_ubuntu/check_style.sh). Most IDEs come with clang-format support, but may require downgrading to [clang-format version 10.0](https://github.com/llvm/llvm-project/releases/tag/llvmorg-10.0.0).

+

 Testing

 -------