[Buildroot] [PATCH] package/rt-tests: add patch to fix compatibility with make 3.81

[Peter Korsgaard]

>>>>> "Peter" == Peter Korsgaard <peter at korsgaard.com> writes:

 > Fixes:
 > http://autobuild.buildroot.net/results/cf7c4f360f5464c700788cc8299fd086544c80e8/build-end.log

 > Older GNU make versions don't like the explicit undefine.  It isn't really
 > needed as ifdef handles undefined and defined-to-the-empty-string the same
 > way, so just drop the undefine logic.

 > Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Committed, thanks.

-- 
Bye, Peter Korsgaard