Move libc.debug. props to libc_debug_prop

Bug: 155844385
Test: sepolicy_tests
Change-Id: I15421ada0c58c3c8d07d824e83cf44f6c4590ca8
diff --git a/private/property.te b/private/property.te
index d479502..7591b85 100644
--- a/private/property.te
+++ b/private/property.te
@@ -339,3 +339,9 @@
 } {
   surfaceflinger_color_prop
 }:property_service set;
+
+neverallow {
+  -init
+} {
+  libc_debug_prop
+}:property_service set;