javac parser needs updates to have better error recovery for error cases of new array creation with dimensions

During work on JDK-8055075 for creation of golden files for negative tests, it was suggested to have a better error message recovery for test case:

 int[] foo = new int[=] { 1, 2, 3 };

Current error raw diagnostics:
ExtraneousEquals.java:10:23: compiler.err.illegal.start.of.expr
ExtraneousEquals.java:10:24: compiler.err.illegal.start.of.expr
ExtraneousEquals.java:10:25: compiler.err.expected: ';'
ExtraneousEquals.java:10:28: compiler.err.not.stmt
ExtraneousEquals.java:10:29: compiler.err.expected: ';'
5 errors

Test: langtools/test/tools/javac/ExtraneousEquals.java
Golden file for this test will need updates once this issue is fixed.