glibc: fixed multilib build by moving i686 workaround into preconf hook

base/glibc/glibc.conf

@@ -119,6 +119,11 @@ var_append extraconfopt " " "--enable-kernel=2.6.32"
 pkg_glibc_preconf() {
 	configprefix='CFLAGS="$CFLAGS -g -DNDEBUG=1 -O2"'
 	configscript="../configure"
+
+	# workaround for failing builds when building for i686 cpu family
+	case $arch_machine in
+		i686) var_append extraconfopt ' ' "--disable-multi-arch" ;;
+	esac
 }
 hook_add preconf 3 "pkg_glibc_preconf"
 
@@ -321,9 +326,3 @@ if atstage toolchain; then
 	makeopt=
 	makeinstopt="-k cross-compiling=yes install-headers"
 fi
-
-# workaround for failing builds when building for i686 cpu family
-case $arch_machine in
-	i686) var_append extraconfopt ' ' "--disable-multi-arch" ;;
-esac
-