Remove SPI and Wire architecture warnings

[microbuilder]

This is purely cosmetic but slipped past us in the 0.6.0 update. For 0.6.1, the following warnings need to be removed when compiling:

WARNING: library Wire claims to run on [Adafruit_nRF52_Arduino] architecture(s) and may be incompatible with your current board which runs on [nrf52] architecture(s).
WARNING: library SPI claims to run on [Adafruit_nRF52_Arduino] architecture(s) and may be incompatible with your current board which runs on [nrf52] architecture(s).
Sketch uses 51792 bytes (30%) of program storage space. Maximum is 167936 bytes.

Also, SRAM usage should be added to the output since this is often more critical than flash on a large chip like this.

[hathach]

SRAM usage is added in the next release