Fix typo in furthark-opencl man page
Fix typo in furthark-opencl man page
diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,HIPERFIT/futhark,ihc/futhark,HIPERFIT/futhark,diku-dk/futhark,ihc/futhark,diku-dk/futhark,ihc/futhark,diku-dk/futhark