Adds @mpeterv test case as regression test for #250.
The test case crashed BPF compilation pipeline before #250 fix.
luajit: ./pf/bpf.lua:65: attempt to compare string with number
stack traceback:
./pf/bpf.lua:65: in function 'runtime_u32'
./pf/bpf.lua:98: in function 'is_power_of_2'
./pf/bpf.lua:253: in function 'alu'
./pf/bpf.lua:327: in function 'compile_lua'
./pf/bpf.lua:444: in function 'compile_filter'
./pf.lua:92: in function 'test_attempt_to_compare_string_with_a_number'
./pf.lua:94: in function 'selftest'
(command line):1: in main chunk
[C]: at 0x004043b0
Adds @mpeterv test case as regression test for #250.
The test case crashed BPF compilation pipeline before #250 fix.