Fix benchmark target naming inconsistency.

Change-Id: I8e5b1ad928ac63254e3d1ef5a92648fa07491cd6
diff --git a/tools/run_benchmark.py b/tools/run_benchmark.py
index bf6087c..545ac5a 100755
--- a/tools/run_benchmark.py
+++ b/tools/run_benchmark.py
@@ -41,8 +41,8 @@
   result.add_argument('--target',
                       help='The test target to run',
                       required=True,
-                      # These should 1:1 with BenchmarkTarget.java
-                      choices=['d8', 'r8', 'r8-force', 'r8-compat'])
+                      # These should 1:1 with benchmarks/BenchmarkTarget.java
+                      choices=['d8', 'r8-full', 'r8-force', 'r8-compat'])
   result.add_argument('--nolib', '--no-lib', '--no-r8lib',
                       help='Run the non-lib R8 build (default false)',
                       default=False,