Revert "Remove %{dist} flag"

Turns out this was a silly idea: the %{dist} flag needs to stay there
for the final builds.  What I wanted to achieve was just remove it from
version as reported in COPR. (Not sure if that is even possible.)

This reverts commit 2f1ea384362d52c7d8c886a5a3ea7aa09509cef6.

slop.spec.in

@@ -1,6 +1,6 @@
 Name:       slop
 Version:    __APP_VERSION__
-Release:    __APP_RELEASE__
+Release:    __APP_RELEASE__%{?dist}
 Summary:    Select Operation
 URL:        https://github.com/naelstrof/slop