fix: failure of make engine test when a make engine alias contains a modifier. There can be more than one variant per alias via "." e.g. make.extrastuff where make and extrastuff are variants.

//<branchInfo originator="sanummel" since="07-03-22" category="" error="kkk"> 
//Add rofsfiles for usage in paged images
//</branchInfo> 
// BRANCH 07-03-22: sanummel