Functions should be sorted by address in output

[rfalke]

Version: d03c2d6
File: https://github.com/rfalke/decompiler-subjects/tree/master/from_holdec/control_flow_structure/ia32_elf

$ grep '^int.*test_.*_4_' by_snowman.c
int32_t test_3_blocks_variant_4_edges_5() {
int32_t test_2_blocks_variant_4_edges_4() {
$ objdump -t subject.exe | grep _4_
0804856f l     F .text  0000003c              test_2_blocks_variant_4_edges_4
08048b90 l     F .text  0000004b              test_3_blocks_variant_4_edges_5
$ 

So the test_2_... method has a lower address but is later in the output.