!21 【kernel_lite】【master】修改README里的时间

Merge pull request !21 from limeng/cherry-pick-1647424382

README.OpenSource

@@ -3,7 +3,7 @@
         "Name"                  : "ltp",
         "License"               : "GPL V2.0",
         "License File"          : "COPYING",
-        "Version Number"        : "2.0",
+        "Version Number"        : "20200515",
         "Owner"                 : "liuxun@huawei.com",
         "Upstream URL"          : "https://github.com/linux-test-project/ltp",
         "Description"           : "The LTP testsuite contains a collection of tools for testing the Linux kernel and related features."