Unify patch file names to avoid RAT issue

Patch files should be named as *.patch to be excluded
correctly when run Apache RAT tool.

The exclude rule is descripted as thirdparty/patches/*.patch
in build-support/release/rat_exclude_files.txt.

Change-Id: I39449abcdbdaa698069395ab63b34495968dd1c4
Reviewed-on: http://gerrit.cloudera.org:8080/20423
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Kudu Jenkins
(cherry picked from commit 092a0ef03b662d4d744eb3557f707cf9f0aba088)
Reviewed-on: http://gerrit.cloudera.org:8080/20424
Tested-by: Yingchun Lai <laiyingchun@apache.org>
2 files changed