android: add Lit config for executing tests on device

Author: zhuowei

test/lit.cfg

@@ -667,6 +667,46 @@ elif run_os == 'linux-gnu':
     config.target_ld = (
         "ld -L%s" %
         (os.path.join(test_resource_dir, config.target_sdk_name)))
+elif run_os == 'linux-androideabi':
+    # Android
+    lit_config.note("Testing Android " + config.variant_triple)
+    config.target_object_format = "elf"
+    config.target_runtime = "native"
+    config.target_swift_autolink_extract = inferSwiftBinary("swift-autolink-extract")
+    config.target_sdk_name = "android"
+    config.target_build_swift = (
+        '%s -target %s -Xlinker --allow-shlib-undefined -Xlinker -pie %s %s %s %s'
+        % (config.swiftc, config.variant_triple, resource_dir_opt, mcp_opt,
+           config.swift_test_options, swift_execution_tests_extra_flags))
+    config.target_swift_frontend = (
+        '%s -frontend -target %s %s'
+        % (config.swift, config.variant_triple, resource_dir_opt))
+    subst_target_swift_frontend_mock_sdk = config.target_swift_frontend
+    subst_target_swift_frontend_mock_sdk_after = ""
+    config.target_run = config.test_source_root + \
+        '/../../swift-android-extras/rundroid'
+    config.target_sil_opt = (
+        '%s -target %s %s %s' %
+        (config.sil_opt, config.variant_triple, resource_dir_opt, mcp_opt))
+    config.target_swift_ide_test = (
+        '%s -target %s %s %s %s' %
+        (config.swift_ide_test, config.variant_triple, resource_dir_opt,
+         mcp_opt, ccp_opt))
+    subst_target_swift_ide_test_mock_sdk = config.target_swift_ide_test
+    subst_target_swift_ide_test_mock_sdk_after = ""
+    config.target_swiftc_driver = (
+        "%s -target %s %s %s" %
+        (config.swiftc, config.variant_triple, resource_dir_opt, mcp_opt))
+    config.target_swift_modulewrap = (
+        '%s -modulewrap -target %s' %
+        (config.swiftc, config.variant_triple))
+    config.target_clang = (
+        "clang++ -target %s %s" %
+        (config.variant_triple, clang_mcp_opt))
+    config.target_ld = (
+        "ld -L%s" %
+        (os.path.join(test_resource_dir, config.target_sdk_name)))
+    config.environment['ANDROID_NDK_HOME'] = os.getenv("ANDROID_NDK_HOME")
 
 else:
     lit_config.fatal("Don't know how to define target_run and "