Add support for parsing #void with Fasta.

pkg/analyzer/test/generated/parser_fasta_test.dart

Index: pkg/analyzer/test/generated/parser_fasta_test.dart
diff --git a/pkg/analyzer/test/generated/parser_fasta_test.dart b/pkg/analyzer/test/generated/parser_fasta_test.dart
index e40cf40461012f82ce6e90f2df0f674bfdf2bb68..6a64b817f5cdcac1a3aef55c98bdb43f302e5c2b 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -621,12 +621,6 @@ class ExpressionParserTest_Fasta extends FastaParserTestCase
 
   @override
   @failingTest
-  void test_parseSymbolLiteral_void() {
-    super.test_parseSymbolLiteral_void();
-  }
-
-  @override
-  @failingTest
   void test_parseUnaryExpression_decrement_super() {
     super.test_parseUnaryExpression_decrement_super();
   }