Add automatic exec groups to cc_common.link

PiperOrigin-RevId: 514332514
Change-Id: I5ea3b2fa70a858c8d206a36ede1eec02fb344bf2
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 a4967e3..aa1bf27 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
@@ -167,6 +167,9 @@
   /** The java toolchain type. */
   public static final String JAVA_TOOLCHAIN_TYPE = "@bazel_tools//tools/jdk:toolchain_type";
 
+  /** The cpp toolchain type. */
+  public static final String CPP_TOOLCHAIN_TYPE = "@bazel_tools//tools/cpp:toolchain_type";
+
   /** A choice of test execution mode, only varies internally. */
   public enum InternalTestExecutionMode {
     NORMAL