sepolicy: Split off /cache/recovery's permissions

/cache/recovery is used by 2 domains: recovery and updater apps. Separate
its perms from the rest of /cache and grant them to those 2 clients

Change-Id: Iacde60744c07423f9876c2f8e3da900543e38ddf
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index 7ca945a..7999ccd 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -1,5 +1,7 @@
 /cache/dalvik-cache(/.*)? u:object_r:dalvikcache_data_file:s0
 
+/cache/recovery(/.*)?     u:object_r:recovery_cache_file:s0
+
 # Auditd is a logging daemon. Put it into logd's context
 /system/bin/auditd        u:object_r:logd_exec:s0
 /data/misc/audit(/.*)?    u:object_r:auditd_log:s0