libwine: Move the wine_fold_string implementation to libwine_port.

libs/port/Makefile.in

@@ -3,6 +3,7 @@ STATICLIB = libwine_port.a
 C_SRCS = \
 	digitmap.c \
 	ffs.c \
+	fold.c \
 	fstatvfs.c \
 	getopt.c \
 	getopt1.c \

libs/wine/Makefile.in

@@ -81,7 +81,6 @@ C_SRCS = \
 	config.c \
 	cptable.c \
 	debug.c \
-	fold.c \
 	ldt.c \
 	loader.c \
 	mbtowc.c \

libs/wine/port.c

@@ -25,8 +25,15 @@
 #include <string.h>
 #include <sys/types.h>
 
+#include "wine/unicode.h"
 #include "wine/library.h"
 
+/* functions from libwine_port that are also exported from libwine for backwards compatibility */
+const void *libwine_port_functions[] =
+{
+    wine_fold_string
+};
+
 /* no longer used, for backwards compatibility only */
 struct wine_pthread_functions;
 static void *pthread_functions[8];