global: update various upstreams

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/tools/wireguard

@@ -1 +1 @@
-Subproject commit fdf2289c323942d4ccbfe91f38fbcf2b65d2b40c
+Subproject commit dbe52236b5bfa2d0d72fceb43210a42f78cef1a8

app/tools/wireguard-go

@@ -1 +1 @@
-Subproject commit fd248c6cb1873229b5e487045accdf7ed7ac822e
+Subproject commit 6cecaf31575d77d8f30be65a0a5d34055ee220a4

build.gradle

@@ -7,7 +7,7 @@ allprojects {
 
 buildscript {
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.1'
     }
     repositories {
         google()

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
+#Tue Apr 17 02:22:10 CEST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip