[Android] Upgrade Kotlin to v1.2.51

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Wed Jul  4 09:22:30 2018 +0200| [128a8d418ad109b3cae38daf209f460f518abc88] | committer: Geoffrey Métais

Upgrade Kotlin to v1.2.51

> https://code.videolan.org/videolan/vlc-android/commit/128a8d418ad109b3cae38daf209f460f518abc88
---

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

diff --git a/build.gradle b/build.gradle
index f7e2881a5..87ee2fa10 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 = '3.1.3'
-    ext.kotlin_version = '1.2.50'
+    ext.kotlin_version = '1.2.51'
     ext.kotlinx_version = '0.23.3'
     repositories {
         flatDir dirs: "gradle/plugins"