[Android] Upgrade Kotlin

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Thu Jan 25 08:46:13 2018 +0100| [71a587efe1e499013d2b8acd964518e4f07ff381] | committer: Geoffrey Métais

Upgrade Kotlin

> https://code.videolan.org/videolan/vlc-android/commit/71a587efe1e499013d2b8acd964518e4f07ff381
---

 build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.gradle b/build.gradle
index 88e0076b4..4d5340cc1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     ext.android_plugin_version = '3.0.1'
-    ext.kotlin_version = '1.2.20'
+    ext.kotlin_version = '1.2.21'
     ext.kotlinx_version = '0.21.2'
     repositories {
         flatDir dirs: "gradle/plugins"