Add PIC32/Harmony http_server example

...2_encx24j600/framework/driver/spi/dynamic/drv_spi_tasks.c

..._sk2_encx24j600/framework/system/clk/src/sys_clk_static.c

..._eth_sk2_encx24j600/framework/system/clk/sys_clk_static.h

..._encx24j600/framework/system/ports/src/sys_ports_static.c

...pic32mx_eth_sk2_encx24j600/pic32mx_eth_sk2_encx24j600.mhc

.../system_config/pic32mx_eth_sk2_encx24j600/system_config.h

...em_config/pic32mx_eth_sk2_encx24j600/system_definitions.h

...tem_config/pic32mx_eth_sk2_encx24j600/system_exceptions.c

...rc/system_config/pic32mx_eth_sk2_encx24j600/system_init.c

...stem_config/pic32mx_eth_sk2_encx24j600/system_interrupt.c

...c/system_config/pic32mx_eth_sk2_encx24j600/system_tasks.c

examples/PIC32/http_server/firmware/tcpip_tcp_client.hconfig