Export LICENSE in bazel

PiperOrigin-RevId: 874490620

BUILD.bazel

diff --git a/BUILD.bazel b/BUILD.bazel
index e7e038d..f8ef4ae 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -30,6 +30,8 @@
 
 licenses(["notice"])
 
+exports_files(["COPYING"])
+
 SNAPPY_VERSION = (1, 2, 2)
 
 config_setting(