Added mkinstalldirs to create directories more portably.

server/Makefile.in

diff --git a/server/Makefile.in b/server/Makefile.in
index 7c1d051..7cf3895 100644
--- a/server/Makefile.in
+++ b/server/Makefile.in
@@ -51,7 +51,7 @@
 	$(CC) -o $(PROGRAMS) $(OBJS) $(LIBWINE) $(LIBUNICODE) $(LIBS) $(LDFLAGS)
 
 install:: $(PROGRAMS)
-	[ -d $(bindir) ] || $(MKDIR) $(bindir)
+	$(MKINSTALLDIRS) $(bindir)
 	$(INSTALL_PROGRAM) wineserver $(bindir)/wineserver
 
 uninstall::