Fix http://llvm.org/bugs/show_bug.cgi?id=11752

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@148069 91177308-0d34-0410-b5e6-96231b3b80d8

include/fstream

@@ -549,7 +549,7 @@ basic_filebuf<_CharT, _Traits>::close()
     {
         __rt = this;
         unique_ptr<FILE, int(*)(FILE*)> __h(__file_, fclose);
-        if ((__cm_ & ios_base::out) && sync())
+        if (sync())
             __rt = 0;
         if (fclose(__h.release()) == 0)
             __file_ = 0;

include/ostream

@@ -1218,12 +1218,12 @@ typename enable_if
 <
     !is_lvalue_reference<_Stream>::value &&
     is_base_of<ios_base, _Stream>::value,
-    _Stream&
+    _Stream&&
 >::type
 operator<<(_Stream&& __os, const _Tp& __x)
 {
     __os << __x;
-    return __os;
+    return _VSTD::move(__os);
 }
 
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES