[owners] Add OWNERs files to shaderc

Bug: 78490
Change-Id: I3b8e9f4350b50e71c4e983bb541f5ac446853f5e
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/shaderc/+/541564
Reviewed-by: Yilong Li <liyl@google.com>
Reviewed-by: Chris Fontas <cfontas@google.com>
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..8ab9c85
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,3 @@
+jjosh@google.com
+liyl@google.com
+cfontas@google.com