dist: fix generating archive with wrong file name for rpm
dist: fix generating archive with wrong file name for rpm

the tar file prefix needs to be only the version without the release
without this bug I get
.
.
.

Finish: build setup for scylla-server-0.8-20150917.2d99476.fc21.src.rpm
Start: rpmbuild scylla-server-0.8-20150917.2d99476.fc21.src.rpm
Building target platforms: x86_64
Building for target x86_64
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.fA7nBm
+ umask 022
+ cd /builddir/build/BUILD
+ cd /builddir/build/BUILD
+ rm -rf scylla-server-0.8
+ /usr/bin/tar -xf
/builddir/build/SOURCES/scylla-server-0.8-20150917.2d99476.tar
+ cd scylla-server-0.8
/var/tmp/rpm-tmp.fA7nBm: line 33: cd: scylla-server-0.8: No such file or
directory

RPM build errors:
error: Bad exit status from /var/tmp/rpm-tmp.fA7nBm (%prep)
    Bad exit status from /var/tmp/rpm-tmp.fA7nBm (%prep)
ERROR:
Exception(build/rpmbuild/SRPMS/scylla-server-0.8-20150917.2d99476.fc21.src.rpm)
Config(fedora-21-x86_64) 4 minutes 17 seconds

Signed-off-by: Shlomi Livne <6f01bf2e882e3bb6371d28d1418e5f729e7183e6@cloudius-systems.com>

rentongzhang/scylla,kjniemi/scylla,guiquanz/scylla,linearregression/scylla,respu/scylla,rluta/scylla,aruanruan/scylla,avikivity/scylla,scylladb/scylla,gwicke/scylla,aruanruan/scylla,eklitzke/scylla,capturePointer/scylla,bowlofstew/scylla,avikivity/scylla,gwicke/scylla,senseb/scylla,shaunstanislaus/scylla,raphaelsc/scylla,avikivity/scylla,acbellini/scylla,guiquanz/scylla,tempbottle/scylla,stamhe/scylla,bowlofstew/scylla,raphaelsc/scylla,rentongzhang/scylla,dwdm/scylla,respu/scylla,eklitzke/scylla,eklitzke/scylla,justintung/scylla,kjniemi/scylla,shaunstanislaus/scylla,victorbriz/scylla,rluta/scylla,wildinto/scylla,scylladb/scylla,rentongzhang/scylla,asias/scylla,victorbriz/scylla,scylladb/scylla,respu/scylla,asias/scylla,kjniemi/scylla,duarten/scylla,capturePointer/scylla,kangkot/scylla,raphaelsc/scylla,aruanruan/scylla,rluta/scylla,phonkee/scylla,scylladb/scylla,tempbottle/scylla,wildinto/scylla,linearregression/scylla,bowlofstew/scylla,guiquanz/scylla,dwdm/scylla,capturePointer/scylla,acbellini/scylla,glommer/scylla,linearregression/scylla,senseb/scylla,stamhe/scylla,duarten/scylla,tempbottle/scylla,gwicke/scylla,duarten/scylla,wildinto/scylla,glommer/scylla,victorbriz/scylla,justintung/scylla,kangkot/scylla,stamhe/scylla,senseb/scylla,phonkee/scylla,acbellini/scylla,phonkee/scylla,glommer/scylla,justintung/scylla,shaunstanislaus/scylla,dwdm/scylla,asias/scylla,kangkot/scylla