Add files aaded by patch 7.3.326.
diff --git a/src/xxd/Make_ming.mak b/src/xxd/Make_ming.mak
new file mode 100644
index 0000000..5147e89
--- /dev/null
+++ b/src/xxd/Make_ming.mak
@@ -0,0 +1,28 @@
+# The most simplistic Makefile, for MinGW gcc on MS-DOS
+
+ifndef USEDLL
+USEDLL = no
+endif
+
+ifeq (yes, $(USEDLL))
+DEFINES =
+LIBS    = -lc
+else
+DEFINES =
+LIBS    =
+endif
+
+CC = gcc
+CFLAGS = -O2 -Wall -DWIN32 $(DEFINES)
+
+ifneq (sh.exe, $(SHELL))
+DEL = rm
+else
+DEL = del
+endif
+
+xxd.exe: xxd.c
+	$(CC) $(CFLAGS) -s -o xxd.exe xxd.c $(LIBS)
+
+clean:
+	-$(DEL) xxd.exe