Ignore new json file made during build of FW
Ignore new json file made during build of FW

Signed Off as piwi1263 <piwi1263@gmail.com>
nanoframework/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter