testlib: fileno is also deprecated in UCRT

The non-standard name was made to have a leading underscore.
Apply same #define trick to it as was done for isatty.

Amends 8fd8dd0492

Change-Id: I5d465e32b2fa0caf1d6fb68fa6fe2da8c36b7fc6
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/testlib/qabstracttestlogger.cpp

@@ -206,6 +206,7 @@ void QAbstractTestLogger::outputString(const char *msg)
 
 #if defined(Q_OS_WINDOWS)
 #define isatty _isatty
+#define fileno _fileno
 #endif
 
     if (isatty(fileno(stream))) {
@@ -222,6 +223,7 @@ void QAbstractTestLogger::outputString(const char *msg)
 
 #if defined(Q_OS_WINDOWS)
 #undef isatty
+#undef fileno
 #endif
 }