Fix RPC container for Broadcom (#21433)

libthrift did not get installed in the Broadcom syncd RPC container. However, syncd-rpc requires it.

Author: saiarcot895

platform/broadcom/docker-syncd-brcm-rpc/Dockerfile.j2

@@ -20,7 +20,8 @@ RUN apt-get update \
     wget                \
     cmake               \
     libnanomsg5         \
-    libnanomsg-dev
+    libnanomsg-dev      \
+    libthrift-0.17.0
 
 {% if docker_syncd_brcm_rpc_debs.strip() -%}
 # Copy locally-built Debian package dependencies