update Android auto-detection.

tools/fiddle/fiddle_main.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include "SkForceLinking.h"
@@ skipping 46 matching lines @@
         encode_to_base64(data->data(), data->size(), stdout);
         fputs(last ? "\"\n" : "\",\n", stdout);
     }
 }
 
 static SkData* encode_snapshot(const sk_sp<SkSurface>& surface) {
     sk_sp<SkImage> img(surface->makeImageSnapshot());
     return img ? img->encode() : nullptr;
 }
 
-#if defined(__linux)
+#if defined(__linux) && !defined(__ANDROID__)
     #include <GL/osmesa.h>
     static sk_sp<GrContext> create_grcontext() {
         // We just leak the OSMesaContext... the process will die soon anyway.
         if (OSMesaContext osMesaContext = OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr)) {
             static uint32_t buffer[16 * 16];
             OSMesaMakeCurrent(osMesaContext, &buffer, GL_UNSIGNED_BYTE, 16, 16);
         }
 
         auto osmesa_get = [](void* ctx, const char name[]) {
             SkASSERT(nullptr == ctx);
@@ skipping 77 matching lines @@
 
     printf("{\n");
     dump_output(rasterData, "Raster", !gpuData && !pdfData && !skpData);
     dump_output(gpuData, "Gpu", !pdfData && !skpData);
     dump_output(pdfData, "Pdf", !skpData);
     dump_output(skpData, "Skp");
     printf("}\n");
 
     return 0;
 }