asan: global read access to /system/asan.options

Bug: 117178352
Test: no denials to /system/asan.options on asan walleye
Change-Id: I6042693afb926a22a3e2be79bd2a7ba062806143
diff --git a/private/file_contexts_asan b/private/file_contexts_asan
index 17ee9d7..c7d72a4 100644
--- a/private/file_contexts_asan
+++ b/private/file_contexts_asan
@@ -4,6 +4,7 @@
 /data/asan/vendor/lib64(/.*)?              u:object_r:system_file:s0
 /data/asan/odm/lib(/.*)?                   u:object_r:system_file:s0
 /data/asan/odm/lib64(/.*)?                 u:object_r:system_file:s0
+/system/asan.options           u:object_r:system_asan_options_file:s0
 /system/bin/asan_extract       u:object_r:asan_extract_exec:s0
 /system/bin/asanwrapper        u:object_r:asanwrapper_exec:s0
 /system/bin/asan/app_process   u:object_r:zygote_exec:s0