[[rdkb][common] fix build error on dropbear ]

[Description]
Fix build error on dropbear

[Release-log]
N/A

Change-Id: I794919d1947845d0cc295f894dbc59cbaddfe73a
diff --git a/recipes-core/dropbear/dropbear_%.bbappend b/recipes-core/dropbear/dropbear_%.bbappend
index af08286..227e27e 100644
--- a/recipes-core/dropbear/dropbear_%.bbappend
+++ b/recipes-core/dropbear/dropbear_%.bbappend
@@ -4,7 +4,7 @@
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
 
-SRC_URI_append = "file://rdkb-dropbear-extend-default-path.patch"
+SRC_URI_append = " file://rdkb-dropbear-extend-default-path.patch "
 
 do_configure_prepend_hybrid () {
     export LIBS="${LIBS} -ltelemetry_msgsender"