Add repository information to official providers

When updating the list of packages provided by the official
repositories, also save the repository names.

schema/aur-schema.sql

@@ -310,6 +310,7 @@ CREATE TABLE PackageBlacklist (
 CREATE TABLE OfficialProviders (
 	ID INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,
 	Name VARCHAR(64) NOT NULL,
+	Repo VARCHAR(64) NOT NULL,
 	Provides VARCHAR(64) NOT NULL,
 	PRIMARY KEY (ID)
 ) ENGINE = InnoDB;