devsim: fix to revision

Author: jkralik

device-simulator/Dockerfile

@@ -2,6 +2,7 @@ FROM alpine:3.12 AS build
 
 RUN apk add --no-cache curl git build-base gcc linux-headers patch
 RUN git clone --recursive -b plgd.dev https://github.com/iotivity/iotivity-lite.git
+RUN (cd /iotivity-lite && git checkout 311705219fd4c17fb5dc858a386e051284c14a80)
 COPY ./src/ /iotivity-lite/
 RUN make -C /iotivity-lite/port/linux CLOUD=1 SECURE=1 DEBUG=1 MNT=1 cloud_server