specfile: build flags modified so koji no longer drops hardening flags

Resolves: #1406688

gmp.spec

@@ -81,11 +81,17 @@ if as --help | grep -q execstack; then
   # the object files do not require an executable stack
   export CCAS="gcc -c -Wa,--noexecstack"
 fi
+
+# Dummy invocation to initialization CFLAGS etc.
+%global _configure :
+%configure
+
 mkdir base
 cd base
 ln -s ../configure .
 %ifarch %{ix86}
-export CFLAGS=$(echo $RPM_OPT_FLAGS | sed -e "s/-mtune=[^ ]*//g" | sed -e "s/-march=[^ ]*//g")" -march=i686"
+export CFLAGS=$(echo $CFLAGS | sed -e "s/-mtune=[^ ]*//g" | sed -e "s/-march=[^ ]*//g")"-g -march=i686"
+export CXXFLAGS=$(echo $CXXFLAGS | sed -e "s/-mtune=[^ ]*//g" | sed -e "s/-march=[^ ]*//g")"-g -march=i686"
 %endif
 ./configure --enable-fat --build=%{_build} --host=%{_host} \
          --program-prefix=%{?_program_prefix} \
@@ -108,7 +114,7 @@ sed -e 's|^hardcode_libdir_flag_spec=.*|hardcode_libdir_flag_spec=""|g' \
     -e 's|-lstdc++ -lm|-lstdc++|' \
     -i libtool
 export LD_LIBRARY_PATH=`pwd`/.libs
-make CFLAGS="$RPM_OPT_FLAGS -g" CXXFLAGS="$RPM_OPT_FLAGS -g" %{?_smp_mflags}
+make %{?_smp_mflags}
 cd ..
 #%ifarch %{ix86}
 #mkdir build-sse2
@@ -252,6 +258,7 @@ exit 0
 %changelog
 * Fri Feb 17 2017 David Kaspar [Dee'Kej] <dkaspar@redhat.com> - 1:6.1.2-3
 - Explicitly added '-g' option into CFLAGS & CXXFLAGS to correctly build .debug_info for i386
+- Build flags modified so the build system no longer drops LDFLAGS hardening flags
 
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1:6.1.2-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild