network:linux: Handle EINTR error

Keep monitoring the file descriptor in case of receiving EINTR.
Also, as EWOULDBLOCK and EAGAIN are the same in linux (and this is linux
specific code) just checking for one of them.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

src/lib/comms/sol-network-linux.c

@@ -238,9 +238,12 @@ _on_event(void *data, int nl_socket, unsigned int cond)
 
     while ((status = recvmsg(nl_socket, &msg, MSG_WAITALL))) {
         if (status < 0) {
-            if (errno == EWOULDBLOCK || errno == EAGAIN)
+            if (errno == EAGAIN)
                 return true;
 
+            if (errno == EINTR)
+                continue;
+
             SOL_WRN("Read netlink error");
             return false;
         }