improve error recovery for extra ')'s after a if/switch/while condition. Before:

improve error recovery for extra ')'s after a if/switch/while condition.  Before:

t.c:3:9: error: expected expression
  if (x)) {
        ^

.. which isn't even true - a statement or expression is fine.  After:

t.c:3:9: error: extraneous ')' after condition, expected a statement
  if (x)) {
        ^

This is the second part of PR12595

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155762 91177308-0d34-0410-b5e6-96231b3b80d8