luci-base: ship rpcd uci access ACL

Ship an ACL definition for granting full read/write access to uci
configuration files via ubus rpc. This is a precondition for enabling
uci session isolation later on.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

modules/luci-base/root/usr/share/rpcd/acl.d/luci-base.json

@@ -0,0 +1,11 @@
+{
+	"uci-access": {
+		"description": "Grant uci write access to all configurations",
+		"read": {
+			"uci": [ "*" ]
+		},
+		"write": {
+			"uci": [ "*" ]
+		}
+	}
+}