INSTALL - Always add video group to rdc user

Previously we relied on "render" to be enough and only used "video" as a
fallback. On some systems like SLES this might not be sufficient.

One issue happened when starting rocprofiler as part of RDC
initialization:
  what():  hsa error code: 4104 HSA_STATUS_ERROR_OUT_OF_RESOURCES
The issue only happened when RDC was started with systemd.
Turns out "rdc" user (under which systemctl starts RDC) only had render
but not video group. Adding video group solved the issue.

Change-Id: Idf6a9521ae72a0b28a428869aa7ab1edde3ae259
Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>

src/DEBIAN_postinst.in

@@ -62,11 +62,14 @@ do_create_rdc_user() {
         --no-create-home \
         --disabled-password \
         rdc
+    # only add render if it exists
     if [ $(getent group render) ]; then
         usermod -a -G render rdc
-    else
-        usermod -a -G video rdc
     fi
+
+    # add video always
+    usermod -a -G video rdc
+
     # Make sure this doesn't return non-zero if an id already exists
     return 0
 }

src/RPM_rpm_post.in

@@ -53,12 +53,14 @@ do_update_alternatives(){
 # https://fedoraproject.org/wiki/Packaging%3aUsersAndGroups
 do_create_rdc_user() {
     useradd -r -s /sbin/nologin rdc
+    # only add render if it exists
     if [ $(getent group render) ]; then
         usermod -a -G render rdc
-    else
-        usermod -a -G video rdc
     fi
 
+    # add video always
+    usermod -a -G video rdc
+
     # Make sure this doesn't return non-zero if an id already exists
     return 0
 }