https://bugs.webkit.org/show_bug.cgi?id=51605

Reviewed by Eric Seidel.

Actually move ANGLE and update the Makefile.

* ANGLE: Removed.
* ANGLE/ANGLE.xcodeproj: Removed.
* ANGLE/ANGLE.xcodeproj/project.pbxproj: Removed.
* ANGLE/Configurations: Removed.
* ANGLE/Configurations/ANGLE.xcconfig: Removed.
* ANGLE/Configurations/Base.xcconfig: Removed.
* ANGLE/Configurations/DebugRelease.xcconfig: Removed.
* ANGLE/Makefile: Removed.
* ANGLE/include: Removed.
* ANGLE/include/EGL: Removed.
* ANGLE/include/EGL/egl.h: Removed.
* ANGLE/include/EGL/eglext.h: Removed.
* ANGLE/include/EGL/eglplatform.h: Removed.
* ANGLE/include/GLES2: Removed.
* ANGLE/include/GLES2/gl2.h: Removed.
* ANGLE/include/GLES2/gl2ext.h: Removed.
* ANGLE/include/GLES2/gl2platform.h: Removed.
* ANGLE/include/GLSLANG: Removed.
* ANGLE/include/GLSLANG/ShaderLang.h: Removed.
* ANGLE/include/KHR: Removed.
* ANGLE/include/KHR/khrplatform.h: Removed.
* ANGLE/src: Removed.
* ANGLE/src/build_angle.xcodeproj: Removed.
* AN...