Fix test_simple_linux to resolve segmentation fault

[is-hoku]

Problem

The test_simple_linux build was failing with a segmentation fault.
I ran this command and got the result.

# make simple_test_linux
./build/test/simple_linux_server &
./build/test/simple_linux_client
cc -O3 -fno-strict-aliasing -c /home/hoku/repo/net-blocks/test/test_simple_linux/server.c -o /home/hoku/repo/net-blocks/build/test/simple_test_linux/server.o -I/home/hoku/repo/net-blocks/runtime -I/home/hoku/repo/net-blocks/scratch
cc -O3 -fno-strict-aliasing -c /home/hoku/repo/net-blocks/test/test_simple_linux/client.c -o /home/hoku/repo/net-blocks/build/test/simple_test_linux/client.o -I/home/hoku/repo/net-blocks/runtime -I/home/hoku/repo/net-blocks/scratch
cc -O3 -fno-strict-aliasing -c /home/hoku/repo/net-blocks/runtime/nb_linux_transport.c -o /home/hoku/repo/net-blocks/build/runtime/nb_linux_transport.o -I /home/hoku/repo/net-blocks/runtime -I /home/hoku/repo/net-blocks/scratch
cc /home/hoku/repo/net-blocks/build/runtime/nb_runtime_simple.o /home/hoku/repo/net-blocks/build/runtime/nb_simple.o /home/hoku/repo/net-blocks/build/runtime/nb_timer.o /home/hoku/repo/net-blocks/build/test/simple_test_linux/server.o /home/hoku/repo/net-blocks/build/runtime/nb_linux_transport.o -o /home/hoku/repo/net-blocks/build/test/simple_linux_server
cc /home/hoku/repo/net-blocks/build/runtime/nb_runtime_simple.o /home/hoku/repo/net-blocks/build/runtime/nb_simple.o /home/hoku/repo/net-blocks/build/runtime/nb_timer.o /home/hoku/repo/net-blocks/build/test/simple_test_linux/client.o /home/hoku/repo/net-blocks/build/runtime/nb_linux_transport.o -o /home/hoku/repo/net-blocks/build/test/simple_linux_client
[1] 1432091
Linux Runtime initialized
Linux Runtime initialized
Segmentation fault (core dumped)

Solution

I modified the initialization sequence to ensure nb__my_host_id is set before calling nb__net_init.
After fixing the code, I got this result.

Linux Runtime initialized
Linux Runtime initialized
Received = Hello from client
Received = Hello from server