GN(Android): Add libosmesa.so to ContentShell.apk

build/toolchain/android/BUILD.gn

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/sysroot.gni")  # Imports android/config.gni.
 import("//build/toolchain/gcc_toolchain.gni")
 
 # The Android GCC toolchains share most of the same parameters, so we have this
 # wrapper around gcc_toolchain to avoid duplication of logic.
 #
@@ skipping 31 matching lines @@
     } else {
       cc = "${tool_prefix}gcc"
       cxx = "${tool_prefix}g++"
     }
     ar = tool_prefix + "ar"
     ld = cxx
     readelf = tool_prefix + "readelf"
     nm = tool_prefix + "nm"
     strip = "${tool_prefix}strip"
 
+    # Don't use .cr.so for loadable_modules since they are always loaded via
+    # absolute path.
+    loadable_module_extension = ".so"
+
     toolchain_os = "android"
     toolchain_cpu = invoker.toolchain_cpu
   }
 }
 
 template("android_gcc_toolchains_helper") {
   android_gcc_toolchain(target_name) {
     android_ndk_sysroot = invoker.android_ndk_sysroot
     android_ndk_lib_dir = invoker.android_ndk_lib_dir
     tool_prefix = invoker.tool_prefix
@@ skipping 49 matching lines @@
   toolchain_cpu = "aarch64"
 }
 
 android_gcc_toolchains_helper("mips64el") {
   android_ndk_sysroot = "$android_ndk_root/$mips64_android_sysroot_subdir"
   android_ndk_lib_dir = "usr/lib64"
 
   tool_prefix = "$mips64_android_toolchain_root/bin/mipsel-linux-android-"
   toolchain_cpu = "mipsel64el"
 }