[android] Convert linker tests to platform mode.

build/android/pylib/base/test_instance_factory.py

Index: build/android/pylib/base/test_instance_factory.py
diff --git a/build/android/pylib/base/test_instance_factory.py b/build/android/pylib/base/test_instance_factory.py
index 3ce77f9d20dfccead081d541787b2fc4901288ae..7c21260161272c63f2470bc04cf1471217b4d021 100644
--- a/build/android/pylib/base/test_instance_factory.py
+++ b/build/android/pylib/base/test_instance_factory.py
@@ -5,6 +5,7 @@
 from pylib.gtest import gtest_test_instance
 from pylib.instrumentation import instrumentation_test_instance
 from pylib.junit import junit_test_instance
+from pylib.linker import linker_test_instance
 from pylib.monkey import monkey_test_instance
 from pylib.perf import perf_test_instance
 from pylib.utils import device_dependencies
@@ -20,6 +21,8 @@ def CreateTestInstance(args, error_func):
         args, device_dependencies.GetDataDependencies, error_func)
   elif args.command == 'junit':
     return junit_test_instance.JunitTestInstance(args, error_func)
+  elif args.command == 'linker':
+    return linker_test_instance.LinkerTestInstance(args)
   elif args.command == 'monkey':
     return monkey_test_instance.MonkeyTestInstance(args, error_func)
   elif args.command == 'perf':