android: Support host multilib builds.

test/android/gyptest-host-multilib.py

+#!/usr/bin/env python
+
+# Copyright (c) 2014 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Verifies that it's possible to build host targets correctly in a multilib
+configuration, explicitly forcing either 32 or 64 bit.
+"""
+
+import TestGyp
+
+test = TestGyp.TestGyp(formats=['android'])
+
+test.run_gyp('host_32or64.gyp')
+
+# Force building as 32-bit
+test.build('host_32or64.gyp', 'generate_output',
+           arguments=['GYP_HOST_VAR_PREFIX=$(HOST_2ND_ARCH_VAR_PREFIX)',
+                      'GYP_HOST_MULTILIB=32'])
+
+test.built_file_must_match('host_32or64.output', 'Hello, 32-bit world!\n')
+
+# Force building as 64-bit
+test.build('host_32or64.gyp', 'generate_output',
+           arguments=['GYP_HOST_VAR_PREFIX=',
+                      'GYP_HOST_MULTILIB=64'])
+
+test.built_file_must_match('host_32or64.output', 'Hello, 64-bit world!\n')
+
+test.pass_test()