populate_sdk_base.bbclass: make failure to find ld-linux.so a hard error
The shell archive that populates the external SDK should fail if it
cannot find the ld-linux.so else it will corrupt all binaries because
a random path will be used from the list of executables when dl_path
is empty.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
