allow suite.pm to skip combinations that originate from test/include files.

storage/innobase/handler/handler0alter.cc:
  for NEWDATE key_type says unsigned, thus col->prtype says unsigned,
  but field->flags says signed. Use the same flag for value retrieval
  that was used for value storage.

mysql-test/include/have_innodb.combinations

@@ -0,0 +1,12 @@
+[innodb_plugin]
+ignore-builtin-innodb
+plugin-load=$HA_INNODB_SO
+innodb
+
+[xtradb_plugin]
+ignore-builtin-innodb
+plugin-load=$HA_XTRADB_SO
+innodb
+
+[xtradb]
+innodb

mysql-test/include/have_innodb.opt

@@ -1,2 +0,0 @@
---loose-innodb
---plugin-load=$HA_XTRADB_SO

mysql-test/include/innodb_rollback_on_timeout.inc

@@ -1,3 +1,4 @@
+--source include/have_innodb.inc
 #
 # Bug #24200: Provide backwards compatibility mode for 4.x "rollback on
 # transaction timeout"