Fix shared library framework builds of Qt with a platform suffix.

This is necessary for combined device and simulator builds on Apple
platforms (iOS, tvOS, watchOS) to link properly.

Change-Id: I21e70806643b10f429945d3020995dc94fa5c612
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

mkspecs/features/qt.prf

@@ -122,7 +122,7 @@ for(ever) {
         QMAKE_FRAMEWORKPATH *= $$MODULE_FRAMEWORKS
         !isEmpty(MODULE_MODULE) {
             contains(MODULE_CONFIG, lib_bundle) {
-                LIBS$$var_sfx += -framework $$MODULE_MODULE
+                LIBS$$var_sfx += -framework $${MODULE_MODULE}$$qtFrameworkPlatformTargetSuffix()
             } else {
                 !isEmpty(MODULE_LIBS_ADD): \
                     LIBS$$var_sfx += -L$$MODULE_LIBS_ADD

mkspecs/features/qt_functions.prf

@@ -13,6 +13,16 @@ defineReplace(qtPlatformTargetSuffix) {
     return($$suffix)
 }
 
+# suffix for the -framework linker flag when the exectuable's name
+# differs from the bundle's, for example -framework QtCore,_debug
+# links to QtCore.framework/QtCore_debug
+defineReplace(qtFrameworkPlatformTargetSuffix) {
+    suffix = $$qtPlatformTargetSuffix()
+    !isEmpty(suffix): \
+        suffix = ,$$suffix
+    return($$suffix)
+}
+
 defineReplace(qtLibraryTarget) {
    LIBRARY_NAME = $$1
    CONFIG(shared, static|shared):contains(QT_CONFIG, qt_framework) {