clang-format: Fix incorrect detection of ObjC "in" keyword.

Before:
  for (auto v : in [1]) { ..

After:
  for (auto v : in[1]) { ..

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@224513 91177308-0d34-0410-b5e6-96231b3b80d8
Enabling this test again on mingw. The problem seems to happen when
two identical module.modulemap are available on the include path and
so should be fixed in the mingw driver include dies, when we'll have it.



git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@224515 91177308-0d34-0410-b5e6-96231b3b80d8