zeromq: check if -latomic is needed

Fixes:
http://autobuild.buildroot.net/results/b149aa2ee00e4d6a53c884cf99ecb2dd8af58b65/
http://autobuild.buildroot.net/results/e4b3616ac2695d3b6898185a70da6509b1faa2b8/

Patch the package to check if -latomic is needed to be added, depending on the
result of AC_LINK_IFELSE.

The patch was sent to upstream, see:
https://github.com/zeromq/libzmq/pull/3083



Signed-off-by: Asaf Kahlon <asafka7@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>