invoke sal_detail_deinitialized() on MacOSX too

LibreOffice.app on Mac, eventually call NSApplicationMain()
which never return.. so the sal_detail_deinitialize()
call intented by SAL_IMPLEMENT_MAIN*() is bypassed.
This will attempt to call it, as late as possible in the NSApplication
lifecycle.

Change-Id: I5cb63bfaeafb784a0fee356ff843b332d8e31932
Reviewed-on: https://gerrit.libreoffice.org/15684Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>

vcl/inc/osx/vclnsapp.h

@@ -47,6 +47,7 @@ class AquaSalFrame;
 -(BOOL)application: (NSApplication*) app printFile: (NSString*)file;
 -(NSApplicationPrintReply)application: (NSApplication *) app printFiles:(NSArray *)files withSettings: (NSDictionary *)printSettings showPrintPanels:(BOOL)bShowPrintPanels;
 -(NSApplicationTerminateReply)applicationShouldTerminate: (NSApplication *) app;
+-(void)applicationWillTerminate: (NSNotification *) aNotification;
 -(void)systemColorsChanged: (NSNotification*) pNotification;
 -(void)screenParametersChanged: (NSNotification*) pNotification;
 -(void)scrollbarVariantChanged: (NSNotification*) pNotification;

vcl/osx/vclnsapp.mm

@@ -20,7 +20,7 @@
 #include <config_features.h>
 
 #include "sal/config.h"
-
+#include "sal/main.h"
 #include <vector>
 
 #include "vcl/window.hxx"
@@ -384,6 +384,12 @@
     return NSPrintingSuccess;
 }
 
+-(void)applicationWillTerminate: (NSNotification *) aNotification
+{
+    (void)aNotification;
+    sal_detail_deinitialize();
+}
+
 -(NSApplicationTerminateReply)applicationShouldTerminate: (NSApplication *) app
 {
     (void)app;