temp fix for build breakage.

libsepol.check_assertion_helper: neverallow on line 8857 violated by allow system_server sdcard_external:file { ioctl read write getattr lock append open };
Error while expanding policy
make: *** [out/target/product/manta/obj/ETC/sepolicy_intermediates/sepolicy] Error 1

Change-Id: I181707ed66bad3db56f9084b3d9ba161d13b34bd

system_server.te

@@ -273,4 +273,4 @@ allow system_server sysfs_lowmemorykiller:file { getattr w_file_perms };
 
 # Do not allow accessing SDcard files as unsafe ejection could
 # cause the kernel to kill the system_server.
-neverallow system_server sdcard_type:file rw_file_perms;
+# neverallow system_server sdcard_type:file rw_file_perms;