cmd/oracle: Fix help message for Go Oracle usage.
cmd/oracle: Fix help message for Go Oracle usage.

Change-Id: Iba2c49c380ca81cd76b84c384ff468b8779f80e4
Reviewed-on: https://go-review.googlesource.com/15382
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

syreclabs/go-tools,cmars/tools,golang/tools,syreclabs/go-tools,syreclabs/go-tools,syreclabs/go-tools,golang/tools,syreclabs/go-tools,cmars/tools,syreclabs/go-tools,golang/tools,golang/tools,golang/tools,cmars/tools,cmars/tools