doc: rearrange execSync and execFileSync

Changed the ordering so it is in line with the async methods.

PR-URL: #2940
Reviewed-By: Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>

doc/api/child_process.markdown

@@ -704,10 +704,9 @@ until the process has completely exited. That is to say, if the process handles
 the `SIGTERM` signal and doesn't exit, your process will wait until the child
 process has exited.
 
-### child_process.execFileSync(file[, args][, options])
+### child_process.execSync(command[, options])
 
-* `file` {String} The filename of the program to run
-* `args` {Array} List of string arguments
+* `command` {String} The command to run
 * `options` {Object}
  * `cwd` {String} Current working directory of the child process
  * `input` {String|Buffer} The value which will be passed as stdin to the spawned process
@@ -725,7 +724,7 @@ process has exited.
  * `encoding` {String} The encoding used for all stdio inputs and outputs. (Default: 'buffer')
 * return: {Buffer|String} The stdout from the command
 
-`execFileSync` will not return until the child process has fully closed. When a
+`execSync` will not return until the child process has fully closed. When a
 timeout has been encountered and `killSignal` is sent, the method won't return
 until the process has completely exited. That is to say, if the process handles
 the `SIGTERM` signal and doesn't exit, your process will wait until the child
@@ -735,10 +734,10 @@ If the process times out, or has a non-zero exit code, this method ***will***
 throw. The `Error` object will contain the entire result from
 [`child_process.spawnSync`](#child_process_child_process_spawnsync_command_args_options)
 
+### child_process.execFileSync(file[, args][, options])
 
-### child_process.execSync(command[, options])
-
-* `command` {String} The command to run
+* `file` {String} The filename of the program to run
+* `args` {Array} List of string arguments
 * `options` {Object}
  * `cwd` {String} Current working directory of the child process
  * `input` {String|Buffer} The value which will be passed as stdin to the spawned process
@@ -756,7 +755,7 @@ throw. The `Error` object will contain the entire result from
  * `encoding` {String} The encoding used for all stdio inputs and outputs. (Default: 'buffer')
 * return: {Buffer|String} The stdout from the command
 
-`execSync` will not return until the child process has fully closed. When a
+`execFileSync` will not return until the child process has fully closed. When a
 timeout has been encountered and `killSignal` is sent, the method won't return
 until the process has completely exited. That is to say, if the process handles
 the `SIGTERM` signal and doesn't exit, your process will wait until the child