Add curly braces for GPHOME var

Authored-by: NTingfang Bao <baotingfang@gmail.com>
(cherry picked from commit ae9bcdda4252524401fe6d1b4752355aa66e18ea)

gpMgmt/bin/generate-greenplum-path.sh

@@ -37,8 +37,8 @@ fi
 
 cat <<"EOF"
 
-if [ -e "$GPHOME/etc/openssl.cnf" ]; then
-	OPENSSL_CONF="$GPHOME/etc/openssl.cnf"
+if [ -e "${GPHOME}/etc/openssl.cnf" ]; then
+	OPENSSL_CONF="${GPHOME}/etc/openssl.cnf"
 fi
 
 export GPHOME