Accepting request 714648 from home:trenn:branches:Base:System

- Add git hash tag and date in version as source is derived from
  master/HEAD branch. Thanks to namtrac.
  This is done via _service file.
  Also add an example how to get back to a stable release version
- Update to latest git master version:
  git commit f7fdebbaa4dbc27fcdeb7

OBS-URL: https://build.opensuse.org/request/show/714648
OBS-URL: https://build.opensuse.org/package/show/Base:System/irqbalance?expand=0&rev=75

_service

@@ -4,7 +4,14 @@
     <param name="scm">git</param>
     <param name="changesgenerate">disable</param>
     <param name="filename">irqbalance</param>
+    <!-- Do use a master branch with git hash in version for Tumbleweed -->
+    <param name="revision">master</param>
+    <param name="versionformat">1.6.0+git%cd.%h</param>
+    <!-- -->
+    <!-- Do use a stable version format below for products that get released
     <param name="versionformat">1.6.0</param>
+    <param name="revision">v1.6.0</param>
+    -->
   </service>
   <service name="set_version" mode="disabled"/>  
   <service name="recompress" mode="disabled">