Make green_wp76xx failes on libjansson.so

[jyijyi]

Hi,
there is similar issue here:

Issue in Installing AF 17.11.0 on Ubuntu

Hi, Did you download the toolchain from here for WP76xx: https://source.sierrawireless.com/resources/airprime/software/wp76xx/wp76xx-firmware-release-7-components/ If no, please try this.

Please use the correct toolchain.