update dts-generator jar with fixes for API 25

Author: petekanev

build-artifacts/project-template-gradle/build-tools/dts-generator.jar

@@ -662,7 +662,7 @@ def shouldIncludeDirForTypings(path, includeDirs) {
 
 task copyTypings {
 	doLast {
-		println "Copied generated typings to application root level."
+		println "Copied generated typings to application root level. Make sure to import android.d.ts in reference.d.ts"
 
 		copy {
 			from "$projectDir/build-tools/typings"