Update the RPM spec to stop including versions in master.

That should be done in the release branches themselves, and the release number in the spec file updated as part of the release process.

extra/simplesamlphp.spec

 %define name      simplesamlphp
 %define summary   SAML IDP/SP written in PHP
-%define version   1.14.8
+%define version   dev
 %define release   1
 %define license   LGPL 2.1
 %define group     Networking/WWW