Allow crash_dump to read misctrl properties

This is used to determine if the device has been in 16k page size mode
to help debug issues with that.

Test: debuggerd_test with ro.misctl.16kb_before="1"
Bug: 335247092
Change-Id: I7b5fcd39cc5b3247d866814fbcf53299d68846c2
diff --git a/private/crash_dump.te b/private/crash_dump.te
index 9bc7cf6..45d5722 100644
--- a/private/crash_dump.te
+++ b/private/crash_dump.te
@@ -109,6 +109,8 @@
 dontaudit crash_dump system_data_file:{ lnk_file file } read;
 dontaudit crash_dump property_type:file read;
 
+get_prop(crash_dump, misctrl_prop)
+
 ###
 ### neverallow assertions
 ###