Update genCert.sh (diyhue#864)

- Add folder creation after touch cert.pem

Author: juanesf

BridgeEmulator/genCert.sh

@@ -3,6 +3,7 @@ mac=$1
 dec_serial=`python3 -c "print(int(\"$mac\".strip('\u200e'), 16))"`
 openssl req -new -days 3650 -config /opt/hue-emulator/openssl.conf  -nodes -x509 -newkey  ec -pkeyopt ec_paramgen_curve:P-256 -pkeyopt ec_param_enc:named_curve   -subj "/C=NL/O=Philips Hue/CN=$mac" -keyout private.key -out public.crt -set_serial $dec_serial
 
+mkdir -p /opt/hue-emulator/config
 touch /opt/hue-emulator/config/cert.pem
 
 cat private.key > "$2/cert.pem"