tools: add the main include directory
tools: add the main include directory

Header record.h is not found in X11/extensions because -I leading
to that directory is missing. I think it was accidently removed
when fixing the CFLAGS misuse in an earlier commit.

Reviewed-by: Dan Nicholson <2570c412b7cbb4203ff39baaca2bd49e72848226@gmail.com>
Signed-off-by: Gaetan Nadon <8a8cc541338200f67d4d0bcb65c78b6166649462@videotron.ca>

mad-s/xf86-input-synaptics-absolute,mad-s/xf86-input-synaptics-absolute