Fix MySQL syntax error in maillogs migration.

update autoincrement -> auto_increment
add ";" after drop table

db/db_mysql/migrations/20171027213457_0.4.1_maillogs.sql

@@ -1,15 +1,15 @@
 
 -- +goose Up
 -- SQL in section 'Up' is executed when this migration is applied
-CREATE TABLE IF NOT EXISTS "mail_logs" (
-    "id" integer primary key autoincrement,
-    "campaign_id" integer,
-    "user_id" integer,
-    "send_date" datetime,
-    "send_attempt" integer,
-    "r_id" varchar(255),
-    "processing" boolean);
+CREATE TABLE IF NOT EXISTS mail_logs (
+    id integer primary key auto_increment,
+    campaign_id integer,
+    user_id integer,
+    send_date datetime,
+    send_attempt integer,
+    r_id varchar(255),
+    processing boolean);
 
 -- +goose Down
 -- SQL section 'Down' is executed when this migration is rolled back
-DROP TABLE "mail_logs"
+DROP TABLE mail_logs;