packaging: fixed rpm build warning

due to package naming change option the rpm build gave warning:
'File listed twice: /usr/bin/ovirt-engine-reports-setup'
this fix causes the file to not appear twice.

Change-Id: I11de2c5bb5442bc17a34479b5e6b5a53a7b68d38
Signed-off-by: Yaniv Dary <ydary@redhat.com>