Remove __pycache__ before uninstall

`__pycache__` might be created when a python script is ran. Which
prevents `rpm -e` and `dpkg --remove` from completely removing the
application. This patch removes `__pycache__` early in the uninstall
process.

A similar issue is resolved in:
rocm_smi_lib Change-Id: I695bd085d4a43b678b563b4c35f6d2e8ddfa7d7c

Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>
Change-Id: I9fe0cd61570c2bd83cf9a45c95837ee6ad11e84b


[ROCm/rdc commit: 69a5a1d6bc]

projects/rdc/src/DEBIAN_prerm.in

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+
+stop_rdc() {
+    #stop RDC if running
+    systemctl stop rdc
+    return 0
+}
+
+reload_systemd() {
+    systemctl daemon-reload
+    return 0
+}
+
+rm_pyc() {
+    # remove pyc file generated by python
+    rm -rf /@RDC_CLIENT_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/@RDC@/python_binding/__pycache__
+}
+
+case "$1" in
+   remove | upgrade )
+       stop_rdc
+       unlink /lib/systemd/system/rdc.service
+       reload_systemd
+       rm_pyc
+   ;;
+   purge)
+   ;;
+   *)
+       exit 0
+   ;;
+esac

projects/rdc/src/RPM_preun.in

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if [ $1 -le 1 ]; then
+    # perform the below actions for rpm remove($1=0) or upgrade($1=1) operations
+    # remove pyc file generated by python
+    rm -rf /@RDC_CLIENT_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/@RDC@/python_binding/__pycache__
+fi