fs-perms.txt: fix ROOT_HOME's permission

It should be 0700 rather than 0755.

Reported-by: Charles Chan <charles.wh.chan@gmail.com>
(From OE-Core rev: 37aac647d510557323083c77c3114476440a325d)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/files/fs-perms.txt

@@ -60,6 +60,9 @@ ${localstatedir}/local		0755	root	root	false - - -
 /tmp				01777	root	root	false - - -
 ${localstatedir}/volatile/tmp	01777	root	root	false - - -
 
+# Set 0700
+${ROOT_HOME}			0700	root	root	false - - -
+
 # Set 755-lsb
 /srv				0755	root	root	false - - -