[Buildroot] [PATCH 1/1] package/rauc-hawkbit-updater: fix build with gcc 4.8

[Fabrice Fontaine]

Fix the following build failure with gcc 4.8 raised since the addition
of the package in commit 928b7219cd7079864eadadc66dbff21c5cd72804:

../src/hawkbit-client.c:873:17: error: 'for' loop initial declarations are only allowed in C99 mode
                 for (const gint *code = &resumable_codes[0]; *code; code++)
                 ^
../src/hawkbit-client.c:873:17: note: use option -std=c99 or -std=gnu99 to compile your code

Fixes: 928b7219cd7079864eadadc66dbff21c5cd72804
 - http://autobuild.buildroot.org/results/e275d0ec4fe1da418a6163b46666316034b83b19

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
---
 package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk b/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
index a453f75a28..3836d3c84e 100644
--- a/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
+++ b/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
@@ -10,5 +10,6 @@ RAUC_HAWKBIT_UPDATER_SOURCE = rauc-hawkbit-updater-$(RAUC_HAWKBIT_UPDATER_VERSIO
 RAUC_HAWKBIT_UPDATER_LICENSE = LGPL-2.1
 RAUC_HAWKBIT_UPDATER_LICENSE_FILES = LICENSE
 RAUC_HAWKBIT_UPDATER_DEPENDENCIES = json-glib libcurl
+RAUC_HAWKBIT_UPDATER_CFLAGS = $(TARGET_CFLAGS) -std=c99
 
 $(eval $(meson-package))
-- 
2.43.0