Improve the parsers resilience to sematic errors. This allows us to turn:

void foo() {
  if (0) break;
  abc:
  def:
  hij:
    break;

into:

void foo() {
  if ((0)')
    ;
abc:
def:
hij:
  ;

instead of dropping the if and labels (due to break not being in a loop).

llvm-svn: 39508