binutils: ld-is-gold should not affect native and crosssdk recipes

gold linker does not support all architectures, currently arm and x86
are best supported, therefore we can not enable this as a full distro
option where we need to support other architectures e.g. ppc, mips
currently, if we enable ld-is-gold distro feature conditionally then it
invalidates native and sdk version of native binutils because configure
option would change. With this patch we limit ld-is-gold feature to
imapact cross binutils and target binutils only. This means that we
can reuse the sdk and native versions across architectures.

(From OE-Core rev: 542609b968f0dc6f56cc9d6aabe4ff0144041261)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/binutils/binutils.inc

@@ -67,10 +67,14 @@ B = "${S}/build.${HOST_SYS}.${TARGET_SYS}"
 
 EXTRA_OECONF = "--program-prefix=${TARGET_PREFIX} \
                 --disable-werror \
-		--enable-plugins \
-		${@base_contains('DISTRO_FEATURES', 'ld-is-gold', '--enable-gold=default --enable-threads', '', d)} \
+                --enable-plugins \
+                ${LDGOLD} \
                 ${@base_contains('DISTRO_FEATURES', 'multiarch', '--enable-64-bit-bfd', '', d)}"
 
+LDGOLD_class-native = ""
+LDGOLD_class-crosssdk = ""
+LDGOLD ?= "${@base_contains('DISTRO_FEATURES', 'ld-is-gold', '--enable-gold=default --enable-threads', '', d)}"
+
 # This is necessary due to a bug in the binutils Makefiles
 # EXTRA_OEMAKE = "configure-build-libiberty all"