Adding set_vprintf_func defines back into glib.h as they were previously in old mono

Author: UnityAlex

builds/versions-win64.txt

@@ -0,0 +1,19 @@
+mono-version =
+Mono JIT compiler version 5.11.0 (Visual Studio built mono)
+Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
+	TLS:           normal
+	SIGSEGV:       normal
+	Notification:  Thread + polling
+	Architecture:  amd64
+	Disabled:      none
+	Misc:          softdebug 
+	Interpreter:   yes
+	LLVM:          supported, not enabled.
+	GC:            sgen (concurrent by default)
+
+unity-mono-revision = 3d155e1031c1faac1db7dc05435ed7665771e611
+
+unity-mono-build-scripts-revision = 3d155e1031c1faac1db7dc05435ed7665771e611
+
+Fri 11/30/2018 
+

mono/eglib/glib.h

@@ -238,6 +238,9 @@ gint         g_vasprintf       (gchar **ret, const gchar *fmt, va_list ap);
 #define g_vsprintf vsprintf
 #define g_vsnprintf vsnprintf
 
+typedef void (*vprintf_func)(const char* msg, va_list args);
+void set_vprintf_func(vprintf_func func);
+
 gsize   g_strlcpy            (gchar *dest, const gchar *src, gsize dest_size);
 gchar  *g_stpcpy             (gchar *dest, const char *src);