uncrypt needs to write to the BCB

and in QC hardware, that's misc_partition...

Change-Id: I1d2f5d11423f01435f17f0e6f5d418cc0ce30e9d
diff --git a/common/uncrypt.te b/common/uncrypt.te
new file mode 100644
index 0000000..8701a6d
--- /dev/null
+++ b/common/uncrypt.te
@@ -0,0 +1,3 @@
+allow uncrypt misc_partition:blk_file w_file_perms;
+allow uncrypt misc_partition:dir r_dir_perms;
+