x11-wm/hyprland: unbreak build with GCC after 33b9f9f8c931

FAILED: src/Hyprland
/usr/local/bin/ld: src/Hyprland.p/managers_ThreadManager.cpp.o: in function `std::1::basic_filebuf<char, std::1::char_traits<char> >::overflow(int)':
ThreadManager.cpp:(.text._ZNSt3113basic_filebufIcNS_11char_traitsIcEEE8overflowEi[_ZNSt3113basic_filebufIcNS_11char_traitsIcEEE8overflowEi]+0x2e4): undefined reference to `std::bad_cast::bad_cast()'
/usr/local/bin/ld: src/Hyprland.p/managers_ThreadManager.cpp.o: in function `std::1::basic_filebuf<char, std::1::char_traits<char> >::sync()':
ThreadManager.cpp:(.text._ZNSt3113basic_filebufIcNS_11char_traitsIcEEE4syncEv[_ZNSt3113basic_filebufIcNS_11char_traitsIcEEE4syncEv]+0x306): undefined reference to `std::bad_cast::bad_cast()'
/usr/local/bin/ld: src/Hyprland.p/managers_ThreadManager.cpp.o: in function `std::1::basic_filebuf<char, std::1::char_traits<char> >::seekoff(long long, std::1::ios_base::seekdir, unsigned int)':
ThreadManager.cpp:(.text._ZNSt3113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj[_ZNSt3__113basic_filebufIcNS_11char_traitsIcEEE7seekoffExNS_8ios_base7seekdirEj]+0x166): undefined reference to `std::bad_cast::bad_cast()'
[...]