Add the right file for the patchless target.

diff --git a/lustre/kernel_patches/targets/2.6-patchless.in b/lustre/kernel_patches/targets/2.6-patchless.target.in
similarity index 100%
rename from lustre/kernel_patches/targets/2.6-patchless.in
rename to lustre/kernel_patches/targets/2.6-patchless.target.in