busybox: pass EXTRA_LDFLAGS for external toolchains

Closes #1321

[Peter: Rework patch to make it apply to git]
Signed-off-by: Grant Edwards <grant.b.edwards@gmail.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
diff --git a/CHANGES b/CHANGES
index 4eccaf0..46b9757 100644
--- a/CHANGES
+++ b/CHANGES
@@ -47,6 +47,7 @@
 	#1219: kernel headers not correctly installed into toolchain/staging
 	#1273: BR2_INET_IPV6 does not enable IPv6 in pppd
 	#1303: Add librsync package
+	#1321: Busybox link fails due to lack of --sysroot option
 	#1327: mtd-utils compile failure due to lack of --sysroot in CFLAGS
 	#1345: Bump pppd to 2.4.5 and convert to Makefile.autotools.in
 	#1369: cannot build radvd (flex problem)