Create Makefile.utils and move ftdump into it

We want to avoid a separate Makefile include for each utility, so this sets
up a general one for utilities.

Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/Makefile.utils b/Makefile.utils
new file mode 100644
index 0000000..0ed9297
--- /dev/null
+++ b/Makefile.utils
@@ -0,0 +1,10 @@
+#
+# This is not a complete Makefile of itself.  Instead, it is designed to
+# be easily embeddable into other systems of Makefiles.
+#
+
+FTDUMP_SRCS = \
+	ftdump.c \
+	util.c
+
+FTDUMP_OBJS = $(FTDUMP_SRCS:%.c=%.o)