ltp: fix makefile race
There is a Makefile dependency race causing occasional build failures:
*** No rule to make target `.../work/core2-poky-linux/ltp/
20130904-r0/git/testcases/kernel/include/linux_syscall_numbers.h.23161.sh', needed by `linux_syscall_numbers.h'. Stop.
This is due to a bad dependency wildcard that is matching more than the one file
it should match, so replace it with a concrete filename.
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
