configure: Don't check for xsltproc twice
configure: Don't check for xsltproc twice

Closes #2664
Reviewed-by: Marius Vollmer <bb11c6e942c5cc765df5f04da146b3198127a7a3@redhat.com>

Armstrong1992/cockpit,FireDrunk/cockpit,arilivigni/cockpit,vanloswang/cockpit,andreasn/cockpit,dperpeet/cockpit,larsu/cockpit,jscotka/cockpit,harishanand95/cockpit,SotolitoLabs/cockpit,michalskrivanek/cockpit,deryni/cockpit,larskarlitski/cockpit,moraleslazaro/cockpit,michalskrivanek/cockpit,larskarlitski/cockpit,matobet/cockpit,larskarlitski/cockpit,mvollmer/cockpit,cockpituous/cockpit,moolitayer/cockpit,vanloswang/cockpit,michalskrivanek/cockpit,arilivigni/cockpit,FireDrunk/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,zigitax/cockpit,xhad/cockpit,garrett/cockpit,xhad/cockpit,stefwalter/cockpit,deryni/cockpit,cockpituous/cockpit,mvollmer/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,haiyangd/cockpit_view,deryni/cockpit,petervo/cockpit,martinpitt/cockpit,deryni/cockpit,michalskrivanek/cockpit,denysvitali/cockpit,cockpit-project/cockpit,cockpituous/cockpit,Scribery/cockpit,cockpituous/cockpit,cockpit-project/cockpit,larsu/cockpit,harishanand95/cockpit,mvollmer/cockpit,deryni/cockpit,petervo/cockpit,Scribery/cockpit,zigitax/cockpit,sgallagher/cockpit,andreasn/cockpit,Scribery/cockpit,moraleslazaro/cockpit,garrett/cockpit,haiyangd/cockpit_view,jscotka/cockpit,matobet/cockpit,michalskrivanek/cockpit,vanloswang/cockpit,matobet/cockpit,mareklibra/cockpit,vanloswang/cockpit,SotolitoLabs/cockpit,Armstrong1992/cockpit,larsu/cockpit,harishanand95/cockpit,denysvitali/cockpit,SotolitoLabs/cockpit,haiyangd/cockpit_view,stefwalter/cockpit,mvollmer/cockpit,martinpitt/cockpit,xhad/cockpit,sgallagher/cockpit,Scribery/cockpit,dperpeet/cockpit,harishanand95/cockpit,cockpit-project/cockpit,mareklibra/cockpit,arilivigni/cockpit,andreasn/cockpit,martinpitt/cockpit,garrett/cockpit,dperpeet/cockpit,larskarlitski/cockpit,Armstrong1992/cockpit,sgallagher/cockpit,cockpituous/cockpit,matobet/cockpit,stefwalter/cockpit,Scribery/cockpit,dperpeet/cockpit,andreasn/cockpit,arilivigni/cockpit,stefwalter/cockpit,mareklibra/cockpit,arilivigni/cockpit,Armstrong1992/cockpit,zigitax/cockpit,moraleslazaro/cockpit,Armstrong1992/cockpit,mvollmer/cockpit,petervo/cockpit,mareklibra/cockpit,harishanand95/cockpit,denysvitali/cockpit,harishanand95/cockpit,larsu/cockpit,larskarlitski/cockpit,moolitayer/cockpit,xhad/cockpit,matobet/cockpit,vanloswang/cockpit,martinpitt/cockpit,deryni/cockpit,sgallagher/cockpit,deryni/cockpit,garrett/cockpit,larsu/cockpit,zigitax/cockpit,Scribery/cockpit,petervo/cockpit,michalskrivanek/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,larsu/cockpit,arilivigni/cockpit,moolitayer/cockpit,zigitax/cockpit,sgallagher/cockpit,sgallagher/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,petervo/cockpit,garrett/cockpit,SotolitoLabs/cockpit,vanloswang/cockpit,FireDrunk/cockpit,larskarlitski/cockpit,mareklibra/cockpit,xhad/cockpit,arilivigni/cockpit,matobet/cockpit,SotolitoLabs/cockpit,petervo/cockpit,moraleslazaro/cockpit,petervo/cockpit,moolitayer/cockpit,moolitayer/cockpit,dperpeet/cockpit,moraleslazaro/cockpit,sgallagher/cockpit,stefwalter/cockpit,jscotka/cockpit,jscotka/cockpit,haiyangd/cockpit_view,martinpitt/cockpit,stefwalter/cockpit,cockpituous/cockpit,haiyangd/cockpit_view,jscotka/cockpit,stefwalter/cockpit,denysvitali/cockpit,vanloswang/cockpit,andreasn/cockpit,larskarlitski/cockpit,dperpeet/cockpit,SotolitoLabs/cockpit,FireDrunk/cockpit,mareklibra/cockpit,xhad/cockpit,cockpit-project/cockpit,Scribery/cockpit,denysvitali/cockpit,andreasn/cockpit,jscotka/cockpit,xhad/cockpit,FireDrunk/cockpit