Changed RPM name to include OS ver info, ex. el7

This patch changes the RPM name to include OS version information, such
as "el7" for RHEL/CentOS 7.
diff --git a/rpm.el7.spec b/rpm.el7.spec
new file mode 100644
index 0000000..8eda749
--- /dev/null
+++ b/rpm.el7.spec
@@ -0,0 +1,37 @@
+#
+# spec file for package cloud-init-vmx-guestinfo
+#
+
+#################################################################################
+# common
+#################################################################################
+Name:           cloud-init-vmx-guestinfo
+Version:        1.0.0
+Release:        1.el7
+Summary:        A cloud-init datasource that uses VMX Guestinfo
+License:        Apache2
+Requires:       cloud-init
+Group:          Applications/System
+BuildArch:      noarch
+
+#################################################################################
+# specific
+#################################################################################
+%description
+A cloud-init datasource that uses VMX Guestinfo
+
+%prep
+
+%build
+
+%install
+mkdir -p %{buildroot}/
+cp -r ./* %buildroot/
+exit 0
+
+%clean
+
+%files
+%defattr(0644, root,root, 0755)
+/etc/cloud/cloud.cfg.d/99_vmx_guestinfo.cfg
+/usr/lib/python2.7/site-packages/cloudinit/sources/DataSourceVmxGuestinfo.py