Fix promisify-child-process use

Summary: Per title. Somehow both typecheck, but importing the module like this doesn't work.

Reviewed By: jknoxville

Differential Revision: D17285507

fbshipit-source-id: 40a38db5dfb52213e0407f8bda83f2ebad5c50c7

src/devices/AndroidDevice.tsx

@@ -8,7 +8,7 @@
 import BaseDevice, {DeviceType, DeviceShell, LogLevel} from './BaseDevice';
 import {Priority} from 'adbkit-logcat-fb';
 import child_process from 'child_process';
-import promisify_child_process from 'promisify-child-process';
+import {spawn} from 'promisify-child-process';
 import ArchivedDevice from './ArchivedDevice';
 import {ReadStream} from 'fs';
 
@@ -82,8 +82,7 @@ export default class AndroidDevice extends BaseDevice {
 
   clearLogs(): Promise<void> {
     this.logEntries = [];
-    return promisify_child_process
-      .spawn('adb', ['logcat', '-c'])
+    return spawn('adb', ['logcat', '-c'])
       .then(_ => undefined);
   }