[README/ANGLE/MG]: Add necessary legal notices for usage of ANGLE

Author: alexytomi

README.md

@@ -128,7 +128,8 @@ PojavLauncher is licensed under [GNU LGPLv3](https://github.com/PojavLauncherTea
 * [Boardwalk](https://github.com/zhuowei/Boardwalk) (JVM Launcher): Unknown License/[Apache License 2.0](https://github.com/zhuowei/Boardwalk/blob/master/LICENSE) or GNU GPLv2.
 * Android Support Libraries: [Apache License 2.0](https://android.googlesource.com/platform/prebuilts/maven_repo/android/+/master/NOTICE.txt).
 * [GL4ES](https://github.com/PojavLauncherTeam/gl4es): [MIT License](https://github.com/ptitSeb/gl4es/blob/master/LICENSE).
-* [MobileGlues](https://github.com/MobileGL-Dev/MobileGlues): [LGPL-2.1 License](https://github.com/MobileGL-Dev/MobileGlues/blob/dev-es/LICENSE)
+* [MobileGlues](https://github.com/MobileGL-Dev/MobileGlues): [LGPL-2.1 License](https://github.com/MobileGL-Dev/MobileGlues/blob/dev-es/LICENSE).
+* [ANGLE](https://chromium.googlesource.com/angle/angle): [All Rights Reserved](app_pojavlauncher/src/main/jniLibs/ANGLE_LICENSE).
 * [OpenJDK](https://github.com/PojavLauncherTeam/openjdk-multiarch-jdk8u): [GNU GPLv2 License](https://openjdk.java.net/legal/gplv2+ce.html).
 * [LWJGL3](https://github.com/PojavLauncherTeam/lwjgl3): [BSD-3 License](https://github.com/LWJGL/lwjgl3/blob/master/LICENSE.md).
 * [LWJGLX](https://github.com/PojavLauncherTeam/lwjglx) (LWJGL2 API compatibility layer for LWJGL3): unknown license.

app_pojavlauncher/src/main/jniLibs/ANGLE_LICENSE

@@ -0,0 +1,32 @@
+// Copyright 2018 The ANGLE Project Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+//     Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+//
+//     Redistributions in binary form must reproduce the above
+//     copyright notice, this list of conditions and the following
+//     disclaimer in the documentation and/or other materials provided
+//     with the distribution.
+//
+//     Neither the name of TransGaming Inc., Google Inc., 3DLabs Inc.
+//     Ltd., nor the names of their contributors may be used to endorse
+//     or promote products derived from this software without specific
+//     prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.