Up-merge test case for bug 35220 from 5.0 (no real code changes).

mysql-test/r/innodb_bug35220.result

+SET storage_engine=InnoDB;

mysql-test/t/innodb_bug35220.test

+#
+# Bug#35220 ALTER TABLE too picky on reserved word "foreign"
+# http://bugs.mysql.com/35220
+#
+
+-- source include/have_innodb.inc
+
+SET storage_engine=InnoDB;
+
+# we care only that the following SQL commands do not produce errors
+-- disable_query_log
+-- disable_result_log
+
+CREATE TABLE bug35220 (foreign_col INT, dummy_cant_delete_all_columns INT);
+ALTER TABLE bug35220 DROP foreign_col;
+DROP TABLE bug35220;