Don't use Mac OS X QCollator backend on iOS

We don't have CoreServices on iOS, which hosts the UC* APIs.

Change-Id: I95b1b173e57665c2fc2cdc1701f8ad57cdc0e567
Reviewed-by: James Turner <james.turner@kdab.com>
Reviewed-by: Aleix Pol Gonzalez <aleixpol@kde.org>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

src/corelib/tools/qcollator_p.h

@@ -47,7 +47,7 @@
 #include <QVector>
 #ifdef QT_USE_ICU
 #include <unicode/ucol.h>
-#elif defined(Q_OS_DARWIN)
+#elif defined(Q_OS_OSX)
 #include <CoreServices/CoreServices.h>
 #endif
 
@@ -57,7 +57,7 @@ QT_BEGIN_NAMESPACE
 typedef UCollator *CollatorType;
 typedef QByteArray CollatorKeyType;
 
-#elif defined(Q_OS_DARWIN)
+#elif defined(Q_OS_OSX)
 typedef QVector<UCCollationValue> CollatorKeyType;
 
 struct CollatorType {

src/corelib/tools/tools.pri

@@ -150,8 +150,8 @@ contains(QT_CONFIG,icu) {
     }
 } else: win32 {
     SOURCES += tools/qcollator_win.cpp
-} else: mac {
-    SOURCES += tools/qcollator_mac.cpp
+} else: macx {
+    SOURCES += tools/qcollator_macx.cpp
 } else {
     SOURCES += tools/qcollator_posix.cpp
 }