Test fixes registering appropriate test toolchain(s).

PiperOrigin-RevId: 441483452
diff --git a/src/test/java/com/google/devtools/build/lib/packages/util/Crosstool.java b/src/test/java/com/google/devtools/build/lib/packages/util/Crosstool.java
index 4bd6256..7cd025d 100644
--- a/src/test/java/com/google/devtools/build/lib/packages/util/Crosstool.java
+++ b/src/test/java/com/google/devtools/build/lib/packages/util/Crosstool.java
@@ -532,6 +532,7 @@
                     + "//third_party/cc_rules/macros:defs.bzl', 'cc_library', 'cc_toolchain',"
                     + " 'cc_toolchain_suite')",
                 "toolchain_type(name = 'toolchain_type')",
+                "toolchain_type(name = 'test_runner_toolchain_type')",
                 "cc_toolchain_alias(name = 'current_cc_toolchain')",
                 "alias(name = 'toolchain', actual = 'everything')",
                 "filegroup(name = 'everything-multilib',",