Add lib64 library location for ZFP since it may exist there instead of lib. (AMReX-Codes#2860)

Author: jrood-nrel

Tools/GNUMake/packages/Make.hdf5

@@ -27,7 +27,7 @@ ifeq ($(USE_HDF5_ZFP),TRUE)
       ZFP_ABSPATH = $(abspath $(ZFP_HOME))
       H5Z_ABSPATH = $(abspath $(H5Z_HOME))
       INCLUDE_LOCATIONS += $(ZFP_ABSPATH)/include $(H5Z_ABSPATH)/include
-      LIBRARY_LOCATIONS += $(ZFP_ABSPATH)/lib $(H5Z_ABSPATH)/lib
+      LIBRARY_LOCATIONS += $(ZFP_ABSPATH)/lib $(ZFP_ABSPATH)/lib64 $(H5Z_ABSPATH)/lib
       LDFLAGS += -Xlinker -rpath -Xlinker $(ZFP_ABSPATH)/lib
     endif
   endif