[Cygwin] wint_t is unsigned int

Cygwin 32bit:
$ echo | gcc -m32 -xc - -E -dM | grep WINT_T
145:#define __SIZEOF_WINT_T__ 4
315:#define __WINT_TYPE__ unsigned int

Cygwin 64bit:
$ echo | gcc -xc - -E -dM | grep WINT_T
147:#define __SIZEOF_WINT_T__ 4
317:#define __WINT_TYPE__ unsigned int

Author: kikairoya

clang/lib/Basic/Targets/X86.h

@@ -639,6 +639,7 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_32TargetInfo : public X86_32TargetInfo {
   CygwinX86_32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : X86_32TargetInfo(Triple, Opts) {
     this->WCharType = TargetInfo::UnsignedShort;
+    this->WIntType = TargetInfo::UnsignedInt;
     DoubleAlign = LongLongAlign = 64;
     resetDataLayout("e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-"
                     "i128:128-f80:32-n8:16:32-a:0:32-S32",
@@ -966,6 +967,7 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_64TargetInfo : public X86_64TargetInfo {
   CygwinX86_64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : X86_64TargetInfo(Triple, Opts) {
     this->WCharType = TargetInfo::UnsignedShort;
+    this->WIntType = TargetInfo::UnsignedInt;
   }
 
   void getTargetDefines(const LangOptions &Opts,