kernel: don't populate source symbolic link
/usr/src/kernel/source deployed by kernel-dev package is symbolically
linking to a build-time kernel source folder, which make no sense when
cross-compiling.
Fixed by not populating it at install stage.
Signed-off-by: Ming Liu <ming.liu@windriver.com>
Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>