[source] package/elfutils: add CFLAG -Wno-format-nonliteral

[LEDE Commits]

jow pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/e5c284bb812a2342f678c854383267c166cf8678

commit e5c284bb812a2342f678c854383267c166cf8678
Author: Alexander Couzens <lynxis at fe80.eu>
AuthorDate: Fri Aug 4 13:09:12 2017 +0200

    package/elfutils: add CFLAG -Wno-format-nonliteral
    
    When a library is using fortify-packages GCC will complain about
    "error: format not a string literal, argument types not checked".
    
    Signed-off-by: Alexander Couzens <lynxis at fe80.eu>
    (cherry picked from commit 6ab45214644166846398e5e520d151c05cc4dd55)
---
 package/libs/elfutils/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/libs/elfutils/Makefile b/package/libs/elfutils/Makefile
index 869513f..a726691 100644
--- a/package/libs/elfutils/Makefile
+++ b/package/libs/elfutils/Makefile
@@ -68,7 +68,7 @@ endif
 CONFIGURE_ARGS += \
 	--without-lzma
 
-TARGET_CFLAGS += -D_GNU_SOURCE -Wno-unused-result
+TARGET_CFLAGS += -D_GNU_SOURCE -Wno-unused-result -Wno-format-nonliteral
 
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include