dt: add patch to fix failures on newer toolchains
On newer toolchains (glibc >= 2.20) _BSD_SOURCE behaviour was deprecated
in favour if the _DEFAULT_SOURCE macro. See man 7 feature_test_macros.
Add patch from Fedora to also consider _DEFAULT_SOURCE. Fixes:
http://autobuild.buildroot.net/results/9e2/
9e2126b0e68d0d59d37616a268adb810efd8281a/
Signed-off-by: Gustavo Zacarias <gustavo.zacarias@free-electrons.com>
Reviewed-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Tested-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>