Bug #19138298 RECORD IN INDEX WAS NOT FOUND ON ROLLBACK, TRYING TO INSERT

Post push fix.  The function cmp_dtuple_rec() was used without a prototype
in the file row0purge.c.  Adding the include file rem0cmp.h to row0purge.c
to resolve this issue.

approved by Krunal over IM.

storage/innobase/row/row0purge.c

@@ -43,6 +43,7 @@ Created 3/14/1997 Heikki Tuuri
 #include "row0vers.h"
 #include "row0mysql.h"
 #include "log0log.h"
+#include "rem0cmp.h"
 
 /*************************************************************************
 IMPORTANT NOTE: Any operation that generates redo MUST check that there