[thirdparty] Update thirdparty licenses

With some recent changes to the gtest and curl builds in thirdparty
there are some license changes that should be made. I noticed
these required changes as a result of a failing kudu-binary jar
license check.

Change-Id: I70cfc5b524e6ad0dc9a592f6728ff9f65752ff70
Reviewed-on: http://gerrit.cloudera.org:8080/17123
Tested-by: Kudu Jenkins
Reviewed-by: Bankim Bhavsar <bankim@cloudera.com>
diff --git a/thirdparty/LICENSE.txt b/thirdparty/LICENSE.txt
index 190941b..dc63b05 100644
--- a/thirdparty/LICENSE.txt
+++ b/thirdparty/LICENSE.txt
@@ -489,7 +489,7 @@
 
 --------------------------------------------------------------------------------
 thirdparty/src/curl-*/: MIT/X derivative license
-libraries: libcurl
+libraries: libcurl, libnghttp2
 Source: http://curl.haxx.se/
 
   Copyright (c) 1996 - 2020, Daniel Stenberg, daniel@haxx.se, and many
@@ -616,8 +616,8 @@
 NOTE: optional build-time dependency
 
 --------------------------------------------------------------------------------
-thirdparty/src/gmock-*/: BSD 3-clause license
-libraries: libgmock
+thirdparty/src/googletest-release-*/: BSD 3-clause license
+libraries: libgmock, libgtest
 Source: https://github.com/google/googletest
 NOTE: build-time dependency
 TODO(KUDU-2696): gmock is unnecessarily linked into the kudu cli binary