package/uboot-tools: fix build with host-openssl

As suggested by Arnout during review of previous iteration, add a patch
to uboot-tools so it uses CFLAGS and not HOSTCFLAGS when building cross
tools

Fixes:
 - http://autobuild.buildroot.org/results/915b509e814bda16be54a24276b9c740c51e5770

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/uboot-tools/0005-tools-Makefile-fix-HOSTCFLAGS-with-CROSS_BUILD_TOOLS.patch

@@ -0,0 +1,28 @@
+From 9f2dce5887bb52e8c7f9ef40a6733d70af72ff1c Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Tue, 30 Apr 2019 18:45:17 +0200
+Subject: [PATCH] tools/Makefile: fix HOSTCFLAGS with CROSS_BUILD_TOOLS
+
+When CROSS_BUILD_TOOLS is set, set HOSTCFLAGS to CFLAGS otherwise CC
+will be used with HOSTCFLAGS which seems wrong
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ tools/Makefile | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/tools/Makefile b/tools/Makefile
+index 12a3027e23..eadeba417d 100644
+--- a/tools/Makefile
++++ b/tools/Makefile
+@@ -272,6 +272,7 @@ subdir- += env
+ 
+ ifneq ($(CROSS_BUILD_TOOLS),)
+ override HOSTCC = $(CC)
++override HOSTCFLAGS = $(CFLAGS)
+ 
+ quiet_cmd_crosstools_strip = STRIP   $^
+       cmd_crosstools_strip = $(STRIP) $^; touch $@
+-- 
+2.20.1
+