cis: Add makefile for building CIS files from text format

Most of the CIS files come from the pcmcia-cs project and are built
from a text format using the pack_cis tool.

In pcmcia-cs 3.2.8, apparently the last release, pack_cis had some
bugs that are fatal when it is built with a current gcc and glibc.
Therefore I refer to my own repackaged version that runs successfully
and generates exactly the same binaries included here.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

cis/Makefile

+# The pack_cis tool from cis-tools
+# <http://git.kernel.org/?p=utils/cis-tools/cis-tools.git>.
+PACK_CIS = pack_cis
+
+CIS_SRC := $(wildcard src/*.cis)
+CIS_BIN := $(notdir $(CIS_SRC))
+
+all: $(CIS_BIN)
+
+%.cis: src/%.cis
+	$(PACK_CIS) -o $@ $<
+
+clean:
+	rm -f $(CIS_BIN)