src/augtool.c: print_aug_error when run_args fails
src/augtool.c: print_aug_error when run_args fails

kumy/augeas,jasperla/augeas,kunkku/augeas,lutter/augeas,manandbytes/augeas,lutter/augeas,mchf/augeas,dafugg/augeas,ptoscano/augeas,hercules-team/augeas-do-not-use,jtopjian/augeas,pevalme/augeas,kumy/augeas,GeoffWilliams/augeas,GeoffWilliams/augeas,jjlin/augeas,dafugg/augeas,jjlin/augeas,mlichvar/augeas,jasperla/augeas,dafugg/augeas,pevalme/augeas,ptoscano/augeas,jtopjian/augeas,mlichvar/augeas,manandbytes/augeas,hercules-team/augeas,raphink/augeas,kunkku/augeas,mchf/augeas,hercules-team/augeas-do-not-use,MikaelSmith/augeas,kumy/augeas,MikaelSmith/augeas,kunkku/augeas,jjlin/augeas,ptoscano/augeas,hercules-team/augeas-do-not-use,pevalme/augeas,hercules-team/augeas,raphink/augeas,mlichvar/augeas,kumy/augeas,lutter/augeas