android: Add 4 new linker tests.

build/android/pylib/linker/test_runner.py

Index: build/android/pylib/linker/test_runner.py
diff --git a/build/android/pylib/linker/test_runner.py b/build/android/pylib/linker/test_runner.py
index a0b486017c0ef51d4ac911ff143170d38ec1e96e..3b4ee5cb3d0023353c65c40e5b7ce46b3cc02b1c 100644
--- a/build/android/pylib/linker/test_runner.py
+++ b/build/android/pylib/linker/test_runner.py
@@ -80,14 +80,14 @@ class LinkerTestRunner(base_test_runner.BaseTestRunner):
     """Sets up and runs a test case.
 
     Args:
-      test: An object which is ostensibly a subclass of LinkerTestCase.
+      test: An object which is ostensibly a subclass of LinkerTestCaseBase.
 
     Returns:
       A TestRunResults object which contains the result produced by the test
       and, in the case of a failure, the test that should be retried.
     """
 
-    assert isinstance(test, test_case.LinkerTestCase)
+    assert isinstance(test, test_case.LinkerTestCaseBase)
 
     try:
       results = test.Run(self.device)