Allow VM precompiled to pass trailing-comma test.

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index 67520f990315a27e11e3fbaa21717b68caada6f3..03fd476165f6a284f9c08aae879297d4f7d36bcf 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -5,12 +5,12 @@
 # This directory contains tests that are intended to show the
 # current state of the language.
 
-[ $compiler != none || ($runtime != vm && $runtime != dartium && $runtime != drt)]
+# Trailing commas are so far supported by:
+# - The VM (vm, dartium, drt, precompiler+dart_precompiled)
+# Remaining targets still fail on arg_param_trailing_comma_test/none.
+[($compiler != none && $compiler != precompiler) || ($runtime != vm && $runtime != dartium && $runtime != drt && $runtime != dart_precompiled)]
 arg_param_trailing_comma_test/none: Fail # Issue 26644
 
-[ $compiler == none || $runtime == dartium && $runtime == drt ]
-arg_param_trailing_comma_test/main_with_trailing: Fail, OK # Dartium only looks for main without args.
-
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) ]
 tearoff_constructor_basic_test: Skip # Crashes in checked mode -- hausner investigating