Introduce cc_configure_lib.bzl#split_escaped

This function allows us to split strings coming from env variables into lists
while respecting %-escaping.

RELNOTES: None.
PiperOrigin-RevId: 187166226
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 9237757..d7abdf6 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
@@ -59,6 +59,9 @@
    */
   public static final String JAVATESTS_ROOT = "io_bazel/src/test/java/";
 
+  /** Location of the bazel repo relative to the workspace root */
+  public static final String BAZEL_REPO_PATH = "";
+
   /** Relative path to the {@code process-wrapper} tool. */
   public static final String PROCESS_WRAPPER_PATH =
       "io_bazel/src/main/tools/process-wrapper";