Label /etc/locale.alias as locale_t on Debian

On Debian, /usr/share/locale/locale.alias is a symlink to
/etc/locale.alias, properly label this file.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=707246

policy/modules/system/miscfiles.fc

@@ -15,6 +15,10 @@ ifdef(`distro_gentoo',`
 /etc/ssl(/.*)?			gen_context(system_u:object_r:cert_t,s0)
 /etc/timezone		--	gen_context(system_u:object_r:locale_t,s0)
 
+ifdef(`distro_debian',`
+/etc/locale.alias	--	gen_context(system_u:object_r:locale_t,s0)
+')
+
 ifdef(`distro_redhat',`
 /etc/sysconfig/clock	--	gen_context(system_u:object_r:locale_t,s0)
 ')