core(logger): avoid destruction of GlobalLoggingInitStruct object

- keep logger available until the program termination

modules/core/src/logger.cpp

@@ -94,8 +94,7 @@ LogLevel GlobalLoggingInitStruct::m_defaultUnconfiguredGlobalLevel = GlobalLoggi
 //
 static GlobalLoggingInitStruct& getGlobalLoggingInitStruct()
 {
-    static GlobalLoggingInitStruct globalLoggingInitInstance;
-    return globalLoggingInitInstance;
+    CV_SINGLETON_LAZY_INIT_REF(GlobalLoggingInitStruct, new GlobalLoggingInitStruct());
 }
 
 // To ensure that the combined struct defined above is initialized even

platforms/scripts/valgrind.supp

@@ -218,6 +218,13 @@
    fun:__itt_*create*
 }
 
+{
+   OpenCV-SingletonLogger
+   Memcheck:Leak
+   ...
+   fun:_ZN2cv5utils7logging8internalL26getGlobalLoggingInitStructEv
+}
+
 {
    OpenCV-gtk_init
    Memcheck:Leak