[build]: install libssl1.0-dev to build snmpd in sonic slave stretch docker

Signed-off-by: Guohan Lu <gulv@microsoft.com>

Author: lguohan

sonic-slave-stretch/Dockerfile

@@ -168,7 +168,7 @@ RUN apt-get update && apt-get install -y \
         python-parse \
 # For snmpd
         default-libmysqlclient-dev \
-        libssl-dev \
+        libssl1.0-dev \
         libperl-dev \
         libpci-dev \
         libpci3 \