Add OWNERS to boringssl_gen

Note: OWNERS are not enforced, yet. This CL prepares the repo for when
we switch on OWNERS approval in Gerrit.

Bug: b/200915407
Change-Id: I916fae46a7779834c67ffdcc79c1982f8853db31
Reviewed-on: https://dart-review.googlesource.com/c/boringssl_gen/+/225204
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..870384f
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,8 @@
+# primary
+rmacnak@google.com
+
+# secondary
+asiva@google.com
+athom@google.com
+kustermann@google.com
+vegorov@google.com