Upgrade to Gradle 5.4.1 and Android plugin to latest alpha.

android/urho3d-lib/build.gradle.kts

@@ -182,7 +182,7 @@ tasks {
             val buildTree = File(android.externalNativeBuild.cmake.buildStagingDirectory, "cmake/release/$docABI")
             named<Exec>("makeDoc") {
                 // This is a hack - expect the first line to contain the path to the embedded CMake executable
-                executable = File(buildTree, "cmake_build_command.txt").readLines().first().split(":").last().trim()
+                executable = File(buildTree, "build_command.txt").readLines().first().split(":").last().trim()
                 workingDir = buildTree
             }
             named<Zip>("documentationZip") {

buildSrc/src/main/kotlin/UrhoCommon.kt

@@ -27,7 +27,7 @@ import java.io.File
 
 val kotlinVersion = embeddedKotlinVersion
 
-const val androidToolsVersion = "3.5.0-alpha11"
+const val androidToolsVersion = "3.5.0-alpha13"
 const val bintrayVersion = "1.8.4"
 const val cmakeVersion = "3.10.2"
 const val junitVersion = "4.12"

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists