docker cd ../paddle in compile file

doc/fluid/install/compile/compile_CentOS.md

@@ -94,7 +94,7 @@
 
 4. 进入Docker后进入paddle目录下：
 
-    `cd paddle`
+    `cd ../paddle`
 
 5. 切换到较稳定版本下进行编译：
 

doc/fluid/install/compile/compile_MacOS.md

@@ -45,7 +45,7 @@
 
 5. 进入Docker后进入paddle目录下：
 
-	`cd paddle`
+	`cd ../paddle`
 
 6. 切换到较稳定版本下进行编译：
 

doc/fluid/install/compile/compile_MacOS_en.md

@@ -49,7 +49,7 @@ Please follow the steps below to install:
 
 5. After entering Docker, go to the paddle directory: 
 
-	`cd paddle`
+	`cd ../paddle`
 
 6. Switch to a more stable version to compile:
 

doc/fluid/install/compile/compile_Ubuntu.md

@@ -91,7 +91,7 @@
 
 4. 进入Docker后进入paddle目录下：
 
-    `cd paddle`
+    `cd ../paddle`
 
 5. 切换到较稳定release分支下进行编译：