Fixes:
http://autobuild.buildroot.net/results/992/99235aa2aca1afe031a088baebbd46057fe75fcd/
/home/autobuild/autobuild/instance-15/output-1/build/tvheadend-fe47ecb5504a521fed9c1ca9705fb0dd2bb8443a/src/atomic.h:253:
undefined reference to `__sync_lock_test_and_set_8'
/home/autobuild/autobuild/instance-15/output-1/build/tvheadend-fe47ecb5504a521fed9c1ca9705fb0dd2bb8443a/src/atomic.h:81:
undefined reference to `__sync_fetch_and_add_8'
The build error was introduced by the latest bump of tvheadend with
commit 67cbbbfe6e.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>