Symbol detection (bss specifically?) in overlays incorrectly duplicates some symbols when defined in symbol_addrs.txt

[Rainchus]

In Mario Party 3's symbol_addrs.txt, I have two overlays that are never loaded at the same time. For some reason, flipping the order these symbols are currently in in the defined symbol_addrs.txt causes both D_80105718_119338_shared_board and D_80105718_ED4E8_name_81 to output D_80105718_119338_shared_board, which then means this symbol is defined in 2 different bss files, which leads to a linker error. To easily test, use the splatSymbolBug branch