Update comments

Signed-off-by: Teddysun <[email protected]>

docker/l2tp/alpine/l2tp.sh

@@ -28,7 +28,7 @@ rand(){
 }
 
 is_64bit(){
-    if [ "$(getconf WORD_BIT)" == "32" ] && [ "$(getconf LONG_BIT)" == "64" ]; then
+    if [ "$(getconf WORD_BIT)" = "32" ] && [ "$(getconf LONG_BIT)" = "64" ]; then
         return 0
     else
         return 1

docker/l2tp/l2tp.sh

@@ -28,7 +28,7 @@ rand(){
 }
 
 is_64bit(){
-    if [ "$(getconf WORD_BIT)" == "32" ] && [ "$(getconf LONG_BIT)" == "64" ]; then
+    if [ "$(getconf WORD_BIT)" = "32" ] && [ "$(getconf LONG_BIT)" = "64" ]; then
         return 0
     else
         return 1