Use Fedora standard linker flags

- Resolves rhbz#1543502

Signed-off-by: Rafael dos Santos <rdossant@redhat.com>

0004-Use-system-LDFLAGS.patch

@@ -0,0 +1,25 @@
+From fbc4d4feef66df7224fde64adae95525e73bf141 Mon Sep 17 00:00:00 2001
+From: Rafael dos Santos <rdossant@redhat.com>
+Date: Tue, 29 May 2018 15:15:24 +0200
+Subject: [PATCH] Use system LDFLAGS
+
+---
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index ac14404..f0d1372 100644
+--- a/Makefile
++++ b/Makefile
+@@ -25,7 +25,7 @@ OBJECTS = grubby.o log.o
+ CC = gcc
+ RPM_OPT_FLAGS ?= -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector
+ CFLAGS += $(RPM_OPT_FLAGS) -std=gnu99 -Wall -Werror -Wno-error=unused-function -Wno-unused-function -ggdb
+-LDFLAGS := 
++LDFLAGS := $(RPM_LD_FLAGS)
+ 
+ grubby_LIBS = -lblkid -lpopt
+ 
+-- 
+2.17.0
+

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 12%{?dist}
+Release: 13%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -13,6 +13,7 @@ Patch1: drop-uboot-uImage-creation.patch
 Patch2: 0001-Change-return-type-in-getRootSpecifier.patch
 Patch3: 0002-Add-btrfs-subvolume-support-for-grub2.patch
 Patch4: 0003-Add-tests-for-btrfs-support.patch
+Patch5: 0004-Use-system-LDFLAGS.patch
 
 BuildRequires: pkgconfig glib2-devel popt-devel 
 BuildRequires: libblkid-devel git-core
@@ -71,6 +72,9 @@ fi
 %{_mandir}/man8/*.8*
 
 %changelog
+* Tue May 29 2018 Rafael dos Santos <rdossant@redhat.com> - 8.40-13
+- Use standard Fedora linker flags (rhbz#1543502)
+
 * Tue Apr 10 2018 Javier Martinez Canillas <javierm@redhat.com> - 8.40-12
 - Use .rpmsave as backup suffix when switching to BLS configuration