Use sigemptyset() API instead of __sigemptyset(). __sigemptyset() has
been removed from glibc public API headers in upcoming (2.26) release
onwards.
Patch taken from:
fdc4277059
Fixes:
http://autobuild.buildroot.net/results/15e24f8c6a3ad2bfd198cc4fb094aeace7d1ee6a/
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
