Opensource more cpp rules tests.

--
MOS_MIGRATED_REVID=108806251
diff --git a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
index f8185f9..1c51bd5 100644
--- a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
+++ b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
@@ -64,4 +64,8 @@
   public static final ImmutableList<String> IGNORED_MESSAGE_PREFIXES = ImmutableList.<String>of();
 
   public static final boolean THIS_IS_BAZEL = true;
+
+  public static final String GCC_INCLUDE_PATH = "external/bazel_tools/tools/cpp/gcc3";
+
+  public static final String TOOLS_REPOSITORY = "@bazel_tools";
 }