Allow using version 26 of Android SDK

Author: rosen-vladimirov

lib/android-tools-info.ts

@@ -8,7 +8,7 @@ import * as path from "path";
 
 export class AndroidToolsInfo implements NativeScriptDoctor.IAndroidToolsInfo {
 	private static ANDROID_TARGET_PREFIX = "android";
-	private static SUPPORTED_TARGETS = ["android-17", "android-18", "android-19", "android-21", "android-22", "android-23", "android-24", "android-25"];
+	private static SUPPORTED_TARGETS = ["android-17", "android-18", "android-19", "android-21", "android-22", "android-23", "android-24", "android-25", "android-26"];
 	private static MIN_REQUIRED_COMPILE_TARGET = 22;
 	private static REQUIRED_BUILD_TOOLS_RANGE_PREFIX = ">=23";
 	private static VERSION_REGEX = /((\d+\.){2}\d+)/;