label block devices

Need to provide labels for the userdata, cache, and encryption
metadata partitions. Addresses multiple auditallow warnings.

Change-Id: I8295c463ae6021f2ec332bf9322ee78aa1cce907
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index c6fb0f9..d020c7e 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -88,6 +88,9 @@
 /dev/block/mmcblk0rpmb                 u:object_r:mmc_rpmb_block_device:s0
 
 /dev/block/zram0                       u:object_r:swap_block_device:s0
+/dev/block/platform/sdhci-tegra\.3/by-name/UDA u:object_r:userdata_block_device:s0
+/dev/block/platform/sdhci-tegra\.3/by-name/CAC u:object_r:cache_block_device:s0
+/dev/block/platform/sdhci-tegra\.3/by-name/MD1 u:object_r:metadata_block_device:s0
 
 # secure os storage
 /data/ss(/.*)?                         u:object_r:tee_data_file:s0