[rdkb][common][app][Fix ccsp-eth-agent build issue]

[Description]
Fix ccsp-eth-agent build issue

without this change, eth agent may build error on ubuntu.20.04

[Release-log]

Change-Id: I72a0eccf9d873c28b426c283ff5082e90aaead67
diff --git a/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend b/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
index 3244638..b411f4c 100644
--- a/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
+++ b/recipes-ccsp/ccsp/ccsp-eth-agent.bbappend
@@ -9,7 +9,7 @@
 do_filogic_patches() {
     cd ${S}
 
-    if [ ! -e filogic_patch_applied ] && [[ "${PROJECT_BRANCH}" == "rdkb-2024q1-dunfell" || "${PROJECT_BRANCH}" == "rdkb-2024q1-kirkstone" ]]; then
+    if [ ! -e filogic_patch_applied ] && ([ "${PROJECT_BRANCH}" = "rdkb-2024q1-dunfell" ] || [ "${PROJECT_BRANCH}" = "rdkb-2024q1-kirkstone" ]); then
         patch -p1 < ${WORKDIR}/Fix-ccsp-eth-agent-build-error.patch
         touch filogic_patch_applied
     fi