lirc-tools: fix static library build caused by 'loglevel' redefinition

This commit adds a patch to lirc-tools to fix static library builds
caused by the redefinition of the loglevel variable.

Fixes:

  http://autobuild.buildroot.org/results/2ac/2ac6a4f946d48cacff85d44d662e1c103f7443f8/



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>