cc3200: Add I2C module. Only master mode is currently supported.

cc3200/application.mk

cc3200/fatfs/src/drivers/sflash_diskio.c

cc3200/hal/i2c.c

cc3200/hal/i2c.h

cc3200/hal/rom_patch.h

cc3200/misc/pin_named_pins.c

cc3200/mods/modpyb.c

cc3200/mods/pybextint.c

cc3200/mods/pybi2c.c

cc3200/mods/pybi2c.h

cc3200/mods/pybpin.c

cc3200/mods/pybpin.h

cc3200/mods/pybuart.c

cc3200/mpconfigport.h

cc3200/mptask.c

cc3200/qstrdefsport.h