[vm] Enable mirrors in product mode. Allows building a product mode SDK.

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index f803bf6a079477c0ebab0969fdadf5e35cb352a7..ea4c866dea38b7b845592cabb014a16d13652e66 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -170,7 +170,7 @@ export_ambiguous_main_negative_test: Skip # Issue 29895
 [ $compiler == precompiler && $runtime == dart_precompiled && $mode == debug ]
 regress_29025_test: Crash  # Issue dartbug.com/29331
 
-[ $runtime == dart_precompiled || $mode == product ]
+[ $runtime == dart_precompiled ]
 # Imports dart:mirrors
 const_evaluation_test: SkipByDesign
 deferred_constraints_constants_test: SkipByDesign
@@ -193,6 +193,8 @@ super_call4_test: SkipByDesign
 super_getter_setter_test: SkipByDesign
 vm/reflect_core_vm_test: SkipByDesign
 regress_28255_test: SkipByDesign
+
+[ $runtime == dart_precompiled || $mode == product ]
 # Causal async stacks are not supported in product mode
 vm/causal_async_exception_stack_test: SkipByDesign
 vm/causal_async_exception_stack2_test: SkipByDesign
@@ -251,11 +253,11 @@ library_env_test/has_no_html_support: RuntimeError, OK
 library_env_test/has_html_support: RuntimeError, OK
 library_env_test/has_no_io_support: RuntimeError, OK
 
-[ ($compiler == none || $compiler == app_jit) && $mode != product ]
+[ $compiler == none || $compiler == app_jit ]
 # The following tests are supposed to fail.
 library_env_test/has_no_mirror_support: RuntimeError, OK
 
-[ $runtime == dart_precompiled || $mode == product ]
+[ $runtime == dart_precompiled ]
 # The following tests are supposed to fail.
 library_env_test/has_mirror_support: RuntimeError, OK