Introduce arch-specific checker tests.

- The '.cfg' output is now created on target.
- Arch-specific checker tests can be created by inserting a
  suffix. For example:
      /// CHECK-START-ARM64: int Main.foo(int) register (after)
      /// CHECK-DAG:   <<Arg:i\d+>>     ParameterValue

Change-Id: I55cdb37f8e806c7ffdde6b676c8f44ac30b59051
diff --git a/tools/checker/run_unit_tests.py b/tools/checker/run_unit_tests.py
index 01708db..2f5b1fe 100755
--- a/tools/checker/run_unit_tests.py
+++ b/tools/checker/run_unit_tests.py
@@ -18,7 +18,8 @@
 from file_format.c1visualizer.test import C1visualizerParser_Test
 from file_format.checker.test      import CheckerParser_PrefixTest, \
                                           CheckerParser_RegexExpressionTest, \
-                                          CheckerParser_FileLayoutTest
+                                          CheckerParser_FileLayoutTest, \
+                                          CheckerParser_ArchTests
 from match.test                    import MatchLines_Test, \
                                           MatchFiles_Test