tools: Add mkfwumdata tool for FWU metadata image

Add 'mkfwumdata' tool to generate FWU metadata image for the meta-data
partition to be used in A/B Update imeplementation.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
diff --git a/tools/Makefile b/tools/Makefile
index 38699b0..1e3fce0 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -250,6 +250,10 @@
 	$(shell pkg-config --libs uuid 2> /dev/null || echo "-luuid")
 hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule
 
+mkfwumdata-objs := mkfwumdata.o lib/crc32.o
+HOSTLDLIBS_mkfwumdata += -luuid
+hostprogs-$(CONFIG_TOOLS_MKFWUMDATA) += mkfwumdata
+
 # We build some files with extra pedantic flags to try to minimize things
 # that won't build on some weird host compiler -- though there are lots of
 # exceptions for files that aren't complaint.