LUCIDDB/BUILD: include generated bcp from flatfile tests in clean target
LUCIDDB/BUILD: include generated bcp from flatfile tests in clean target

[git-p4: depot-paths = "//open/lu/dev/": change = 6142]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb