This was missing leading to gcc-source-<foo> being built when using gcc-cross-<bar> with GCCVERSION=bar.
(From OE-Core rev: fa249f347b3453537ee6aaea0d3bb75cfe7a75d1)
Signed-off-by: Koen Kooi <koen.kooi@linaro.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>