Fix more usage of Foldable definitions.
Fix more usage of Foldable definitions.

diku-dk/futhark,mrakgr/futhark,HIPERFIT/futhark,diku-dk/futhark,ihc/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,CulpaBS/wbBach,diku-dk/futhark,HIPERFIT/futhark,mrakgr/futhark,ihc/futhark,ihc/futhark,mrakgr/futhark