added 72b ddr4 16G IP + example design

.../refdesigns/ddr4/ip_arria10_e2sg_ddr4_16g_1600_64b_ed.qar

.../refdesigns/ddr4/ip_arria10_e2sg_ddr4_16g_1600_72b_ed.qar

...signs/refdesigns/ddr4/unb2c_ed_synth_mb_II_16G.sof.tar.gz

libraries/technology/ddr/tech_ddr_arria10_e2sg.vhd

libraries/technology/ddr/tech_ddr_component_pkg.vhd

libraries/technology/ddr/tech_ddr_pkg.vhd

...ria10_e2sg/ddr4_16g_1600/ddr4_16g_1600_64b/compile_ip.tcl

...0_e2sg/ddr4_16g_1600/ddr4_16g_1600_64b/copy_hex_files.tcl

...p_arria10_e2sg/ddr4_16g_1600/ddr4_16g_1600_64b/hdllib.cfg

...00/ddr4_16g_1600_64b/ip_arria10_e2sg_ddr4_16g_1600_64b.ip

...ria10_e2sg/ddr4_16g_1600/ddr4_16g_1600_72b/compile_ip.tcl

...0_e2sg/ddr4_16g_1600/ddr4_16g_1600_72b/copy_hex_files.tcl

...p_arria10_e2sg/ddr4_16g_1600/ddr4_16g_1600_72b/hdllib.cfg

...00/ddr4_16g_1600_72b/ip_arria10_e2sg_ddr4_16g_1600_72b.ip