src/augtool.c: rename echo to echo_commands to fix differing types reported with Solaris linker
src/augtool.c: rename echo to echo_commands to fix differing types reported
with Solaris linker

Fixes ticket #262

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