[cc] Add per-file OWNERS for cc/coverage.go

Test: N/A
Change-Id: I728208ed9ef10e032fd12e495ba67121e4c849e5
diff --git a/cc/OWNERS b/cc/OWNERS
index a7e6ebb..a438b15 100644
--- a/cc/OWNERS
+++ b/cc/OWNERS
@@ -1,4 +1,4 @@
 per-file ndk_*.go = danalbert@google.com
 per-file tidy.go = srhines@google.com, chh@google.com
 per-file afdo.go,afdo_test.go,lto.go,pgo.go = srhines@google.com, pirama@google.com, yikong@google.com
-
+per-file coverage.go = pirama@google.com, srhines@google.com, allenhair@google.com