x1000-installer: Initial commit of new framework

This is a new flash installer framework for the X1000 targets.

A bunch of this code is *UNTESTED* but there is an external test
harness which allows the library to be built and tested on a PC.

Once tests are written and the bugs are ironed out this framework
will replace the existing installer code.

New features:

- Update tarballs are MD5-checksummed to guarantee integrity.
- The flash map is no longer fixed -- updates are self describing and
  carry a map file which specifies the areas to update.
- Can take full or partial backups with checksums computed on the fly.
- Supports an additional verification mode which reads back data after
  writing to ensure the flash contents were not silently corrupted.

Change-Id: I29a89190c7ff566019f6a844ad0571f01fb7192f

lib/x1000-installer/Makefile

@@ -0,0 +1,38 @@
+OBJ = src/xf_error.o \
+	  src/xf_flashmap.o \
+	  src/xf_nandio.o \
+	  src/xf_package.o \
+	  src/xf_stream.o \
+	  src/xf_update.o
+LIB = libx1000-installer.a
+
+TOBJ = test_lib/core_alloc.o \
+	   test_lib/fakenand.o \
+	   test_lib/file.o \
+	   test_lib/pathfuncs.o \
+	   test_lib/md5.o \
+	   test_lib/strlcpy.o \
+	   test/main.o
+TBIN = xf_test
+
+# dependency needs to be built manually
+MTARINC = -I../microtar/src
+MTARLIB = ../microtar/libmicrotar.a
+
+CPPFLAGS = -Iinclude -Itest_lib $(MTARINC) -D_XOPEN_SOURCE=500 -D_POSIX_C_SOURCE=200809L
+CFLAGS = -std=c99 -Wall -Wextra -O2
+
+all: $(LIB) $(TBIN)
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+$(LIB): $(OBJ)
+	$(AR) rcs $@ $^ >/dev/null
+
+$(TBIN): $(TOBJ) $(LIB) $(MTARLIB)
+	$(CC) -o $@ $^
+
+clean:
+	rm -f $(LIB) $(OBJ)
+	rm -f $(TBIN) $(TOBJ)