Add tokens and entry points for KHR_blend_equation_advanced

src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp

Index: src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
diff --git a/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp b/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
index 99219d0fd52ba53651c80a040aea20590841aeae..4569cc8f23f0e730687d26734c23bacc4d7bcb71 100644
--- a/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
+++ b/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
@@ -30,6 +30,8 @@ static GrGLFuncPtr android_get_gl_proc(void* ctx, const char name[]) {
         return (GrGLFuncPtr) glBindTexture;
     } else if (0 == strcmp("glBlendColor", name)) {
         return (GrGLFuncPtr) glBlendColor;
+    } else if (0 == strcmp("glBlendEquation", name)) {
+        return (GrGLFuncPtr) glBlendEquation;
     } else if (0 == strcmp("glBlendFunc", name)) {
         return (GrGLFuncPtr) glBlendFunc;
     } else if (0 == strcmp("glBufferData", name)) {