Add bclayton to OWNERS

Bug: enable CL approval under strict owners check
Change-Id: Id167093ddaa3aa609a04a9e946ad8482981e3b76
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/60408
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

OWNERS

diff --git a/OWNERS b/OWNERS
index 096f9b0..56d01f5 100644
--- a/OWNERS
+++ b/OWNERS
@@ -14,4 +14,5 @@
 cwallez@google.com
 amaiorano@google.com
 natsu@google.com
-schuffelen@google.com
\ No newline at end of file
+schuffelen@google.com
+bclayton@google.com
\ No newline at end of file