* build/aux/move-if-change: refresh with latest from gnulib
* build/aux/move-if-change: refresh with latest from gnulib

Taken from gnulib commit 1602f0af

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