Fix the python build (again?)
Fix the python build (again?)

desugarer.o looks like a typo.  desugaring.o exists and seems to make things work again.
google/jsonnet,jbeda/jsonnet,davidzchen/jsonnet,lamuguo/jsonnet,sparkprime/jsonnet,Neeke/jsonnet,huggsboson/jsonnet,davidzchen/jsonnet,sparkprime/jsonnet,sparkprime/jsonnet,google/jsonnet,Neeke/jsonnet,huggsboson/jsonnet,jbeda/jsonnet,Neeke/jsonnet,huggsboson/jsonnet,huggsboson/jsonnet,sparkprime/jsonnet,jbeda/jsonnet,google/jsonnet,google/jsonnet,google/jsonnet,Neeke/jsonnet,lamuguo/jsonnet,jbeda/jsonnet,davidzchen/jsonnet,lamuguo/jsonnet,google/jsonnet,jbeda/jsonnet,davidzchen/jsonnet,davidzchen/jsonnet,lamuguo/jsonnet,Neeke/jsonnet,huggsboson/jsonnet,sparkprime/jsonnet,sparkprime/jsonnet,lamuguo/jsonnet