Fix colemak patch

[s-hamann]

At Gentoo (gentoo/gentoo#32472), we found that the Colemak and Colemak-DH patches do not apply cleanly on the latest 4.9 release nor on master:

$ make O_COLEMAK=1
patching file src/nnn.c
Hunk #1 FAILED at 5098.
1 out of 1 hunk FAILED -- saving rejects to file src/nnn.c.rej
patching file src/nnn.h
Hunk #1 succeeded at 138 (offset 1 line).
Hunk #2 succeeded at 156 (offset 1 line).
Hunk #3 succeeded at 201 (offset 2 lines).
Hunk #4 succeeded at 228 (offset 2 lines).
Hunk #5 succeeded at 245 (offset 2 lines).
Hunk #6 succeeded at 257 (offset 2 lines).
make[1]: *** [Makefile:343: prepatch] Error 1
make: *** [Makefile:211: nnn] Error 2

Strangely, the check-patches.sh script does not detect this and claims success for all patches/patch combinations. I did not investigate that, though.

This PR fixes the Colemak patch to apply to master.

[N-R-K]

Strangely, the check-patches.sh script does not detect this and claims success for all patches/patch combinations.

That's alarming. I'll have a look into that when I'm free.