Open-source crosstool configuration tests.

--
MOS_MIGRATED_REVID=108980978
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 1c51bd5..b6d3e54 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
@@ -68,4 +68,6 @@
   public static final String GCC_INCLUDE_PATH = "external/bazel_tools/tools/cpp/gcc3";
 
   public static final String TOOLS_REPOSITORY = "@bazel_tools";
+
+  public static final String MOCK_CROSSTOOL_PATH = "tools/cpp";
 }