Add bme680

[hathach]

• support precompiled library with compiler.libraries.ldflags
• BME680 compiled and tested with basic.ino example, other example doesn't compile due to the EEPROM.h not available on nRF52 platform.
• Also take the chance to rename I2C terminology in the example as well.

Note: the BESC use BME680_I2C_ADDR_PRIMARY(0x76) as default address, we need to change it to BME680_I2C_ADDR_SECONDARY (0x77)

BSEC library version 1.4.7.4
Timestamp [ms], raw temperature [�°C], pressure [hPa], raw relative humidity [%t

713, 31.71, 100486.00, 60.25, 23892.00, 25.00, 0, 31.71, 60.25, 25.00, 500.00, 0
3714, 31.73, 100482.00, 59.81, 55662.00, 25.00, 0, 31.67, 59.98, 25.00, 500.00,0
6714, 31.72, 100480.00, 59.26, 80424.00, 25.00, 0, 31.66, 59.46, 25.00, 500.00,0
9714, 31.69, 100478.00, 58.99, 96679.00, 25.00, 0, 31.63, 59.28, 25.00, 500.00,0