Assure upgradability: Increase QEMU's Epoch and fix SLOF's version (#4)

CentOS's qemu-img packages sets its epoch[0] to 10, so in order to assure the
upgradability we need to make it at least 10 in our spec, but we decided to go
with 11 just for the sake of sense.

In SLOF's case, CentOS's SLOF uses the follow name/versioning standard:
 - SLOF-20150313-5.gitc89b0df.el7.noarch.rpm
to make our SLOF an upgrade option to that we need to change it from:
 - SLOF-0.1.git20160525-1.el7.centos.1.noarch.rpm
to
 - SLOF-20160525-1.el7.centos.1.noarch.rpm

All this is to adequate our packages to what rpm/yum does to compare versions,
following N-E-V-R-A[1]

[0]- https://fedoraproject.org/wiki/Packaging:Naming#Package_Versioning
[1]- http://blog.jasonantman.com/2014/07/how-yum-and-rpm-compare-versions

SLOF/centOS/7.2/SLOF.spec

@@ -3,7 +3,7 @@
 %global gittag qemu-slof-%{gittagdate}
 
 Name:           SLOF
-Version:        0.1.git%{gittagdate}
+Version:        %{gittagdate}
 %define ibm_release  %{?repo}.1
 Release:        1%{?dist}%{?ibm_release}
 Summary:        Slimline Open Firmware
@@ -14,7 +14,7 @@ BuildArch:      noarch
 
 # There are no upstream tarballs.  To prepare a tarball, do:
 #
-#  git clone git://9.42.66.204/slof/slof-frobisher.git
+#  git clone https://github.com/open-power-host-os/slof.git
 #  cd slof-frobisher
 #  git checkout powerkvm-v3.1
 #  git archive --format=tar --prefix=SLOF-%{gittagdate}/ HEAD | gzip > ../SLOF-%{gittagdate}.tar.gz

qemu/centOS/7.2/qemu.spec

@@ -195,7 +195,7 @@ Version: 2.5
 %define pkvm_release .pkvm3_1_1.%{?release_week}0%{?release_day}.%{?release_spin}
 
 Release: 6%{?dist}%{?pkvm_release}
-Epoch: 2
+Epoch: 11
 License: GPLv2+ and LGPLv2+ and BSD
 Group: Development/Tools
 URL: http://www.qemu.org/