nRF52 SDK: Enable setting NRF5 and UNITY path via env variables
This commit will allow NRF5_PATH and UNITY_PATH to be configured via
environmental variables.
PROJECT_NAME := u_pca10056
TARGETS := nrf52840_xxaa
OUTPUT_DIRECTORY := _build
-UNITY_PATH := ../../../../../../../../Unity
-NRF5_PATH := ../../../../../../../../nrf5
+UNITY_PATH ?= ../../../../../../../../Unity
+NRF5_PATH ?= ../../../../../../../../nrf5
JLINK_SERIAL_NUMBER :=
# This is picked up in gcc_startup_nrf52840.S to
# set the heap size. If you modify this value then
