GNU Make: Fix name collision for aurora (AMReX-Codes#3656)

Author: WeiqunZhang

Tools/GNUMake/Make.machines

@@ -123,9 +123,11 @@ ifeq ($(findstring asterix, $(host_name)), asterix)
 endif
 
 ifeq ($(findstring aurora, $(host_name)), aurora)
+ifneq ($(findstring alcf.anl.gov, $(host_name)),alcf.anl.gov)
   which_site := hs
   which_computer := aurora
 endif
+endif
 
 ifeq ($(findstring kestrel, $(NREL_CLUSTER)), kestrel)
   which_site := nrel