mscorwks: Prefer the native version.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47622
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/mscorwks/Makefile.in

@@ -1 +1,6 @@
 MODULE    = mscorwks.dll
+
+EXTRADLLFLAGS = -mno-cygwin
+
+C_SRCS = \
+	mscorwks_main.c

dlls/mscorwks/mscorwks_main.c

@@ -0,0 +1,36 @@
+/*
+ * .NET workstation runtime
+ *
+ * Copyright 2019 Zebediah Figura for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdarg.h>
+#include <windef.h>
+#include <winbase.h>
+
+BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, void *reserved)
+{
+    switch (reason)
+    {
+        case DLL_WINE_PREATTACH:
+            return FALSE;       /* prefer native version */
+        case DLL_PROCESS_ATTACH:
+            DisableThreadLibraryCalls(instance);
+    }
+
+   return TRUE;
+}