u-boot-fw-utils: rework patch from meta-swupdate with higher precedence

The patch with the same name in 'meta-swupdate' fails to apply cleanly
after the patches we have done in meta-digi. So add here a version of
the patch that applies cleanly and with higher precedence in the search
path (using 'dey' distro override).

https://jira.digi.com/browse/DEL-3355

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-arm/recipes-bsp/u-boot/u-boot-fw-utils/dey/0001-Allow-fw-env-tools-to-be-available-as-library.patch

@@ -0,0 +1,27 @@
+From: Stefano Babic <sbabic@denx.de>
+Date: Mon, 22 Jun 2015 14:58:24 +0200
+Subject: [PATCH] Allow fw env tools to be available as library
+
+Signed-off-by: Stefano Babic <sbabic@denx.de>
+---
+ tools/env/Makefile | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/tools/env/Makefile b/tools/env/Makefile
+index de4766ddf8dd..fa2a564bb357 100644
+--- a/tools/env/Makefile
++++ b/tools/env/Makefile
+@@ -23,10 +23,12 @@ endif
+ always := fw_printenv
+ hostprogs-y := fw_printenv
+ 
+-fw_printenv-objs := fw_env.o fw_env_main.o \
++lib-y += fw_env.o \
+ 	crc32.o ctype.o linux_string.o \
+ 	env_attr.o env_flags.o aes.o ../../lib/md5.o
+ 
++fw_printenv-objs := fw_env_main.o $(lib-y)
++
+ quiet_cmd_crosstools_strip = STRIP   $^
+       cmd_crosstools_strip = $(STRIP) $^; touch $@
+