base: Move COMPATIBLE_MACHINE out the scope of SOURCE_MIRROR_FETCH
Recipes setting COMPATIBLE_MACHINE are likely to have SRC_URI
entries which can heavily depend on the configured machine. Skipping
them for SOURCE_MIRROR_FETCH is therefore not advised and leads to
build errors whilst not particularly improving source mirrors.
[YOCTO #8802]
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Ross Burton <ross.burton@intel.com>
