[dev] update README files according to pull request (#103).

Author: winshining

README.CN.md

@@ -27,7 +27,7 @@
 |       功能       | nginx-http-flv-module | nginx-rtmp-module |                  备注                  |
 | :--------------: | :-------------------: | :---------------: | :------------------------------------: |
 | HTTP-FLV (播放)  |           √           |         x         |        支持HTTPS-FLV和chunked回复      | 
-|     GOP缓存      |           √           |         x         |        仅适用于H.264视频和AAC音频      |
+|     GOP缓存      |           √           |         x         |                                        |
 |     虚拟主机     |           √           |         x         |                                        |
 | 省略`listen`配置 |           √           |       见备注      |        配置中必须有一个`listen`        |
 |    纯音频支持    |           √           |       见备注      | `wait_video`或`wait_key`开启后无法工作 |

README.md

@@ -27,7 +27,7 @@ Donate if you like this module. Many thanks to you!
 |         Features        | nginx-http-flv-module | nginx-rtmp-module |                     Remarks                     |
 | :---------------------: | :-------------------: | :---------------: | :---------------------------------------------: |
 |   HTTP-FLV (subscribe)  |           √           |         x         |     HTTPS-FLV and chunked response supported    | 
-|        GOP cache        |           √           |         x         |        Only for H.264 video and AAC audio       |
+|        GOP cache        |           √           |         x         |                                                 |
 |          VHOST          |           √           |         x         |                                                 |
 | Omit `listen` directive |           √           |    See remarks    |  There MUST be at least one `listen` directive  |
 |   Audio-only support    |           √           |    See remarks    |  Won't work if `wait_video` or `wait_key` is on |