buildroot: Add systemd support for AV400. [3/3]

PD#SWPL-126048

Problem:
buildroot doesn't support systemd by default.

Solution:
Add systemd support in buildroot.

Verify:
AV400

Change-Id: Ieb02c188162fe6e92c66d3a6a7400d0765d2dfb6
Signed-off-by: hanliang.xiong <hanliang.xiong@amlogic.com>
diff --git a/dolby_atmos_release/src/S83dsd b/dolby_atmos_release/src/S83dsd
index 453e223..21dd8ad 100755
--- a/dolby_atmos_release/src/S83dsd
+++ b/dolby_atmos_release/src/S83dsd
@@ -8,7 +8,7 @@
     if [ ! -d "/tmp/ds/" ]; then
         mkdir -p /tmp/ds/
     fi
-    $DSD /usr/lib/libdolby_atmos.so   /tmp/ds/0xc7_0xfba4_0x5e.so
+    $DSD /usr/lib/libdolby_atmos.so   /tmp/ds/0xc7_0xfba4_0x5e.so || true
     ;;
     *)
     echo "Usage: S83dsd {start}" >&2