COMPILE_TIME_ERROR.MISSING_OBJECT_PATTERN_GETTER_NAME in a few tests

[scheglov]

The code is like

class A {
  final int foo;
  const A(this.foo);
}

void f(x) {
  if (x case {0: A(1)}) {}
}

Here A(1) is a pattern, and we have to say A(foo: 1) to make it a valid object pattern. Alternatively we can use const A(1). I'm not sure what was your intention in this test though.

co19/LanguageFeatures/Patterns/map_A01_t01
co19/LanguageFeatures/Patterns/map_A01_t02
co19/LanguageFeatures/Patterns/map_A01_t03