games/veloren: unbreak on FreeBSD < 12

= note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/usr/local/lib/rustlib/x86_64-unknown-freebsd/lib" "/wrkdirs/usr/ports/games/veloren/work/target/release/deps/veloren_voxygen-843c89249209bb67.veloren_voxygen.76os4767-cgu.6.rcgu.o" "-o" "/wrkdirs/usr/ports/games/veloren/work/target/release/deps/veloren_voxygen-843c89249209bb67" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-Wl,-O1" "-nodefaultlibs" "-L" "/wrkdirs/usr/ports/games/veloren/work/target/release/deps" "-L" "/usr/local/lib" "-L" "/wrkdirs/usr/ports/games/veloren/work/target/release/build/libloading-270f3080df6654be/out" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/usr/local/lib" "-L" "/wrkdirs/usr/ports/games/veloren/work/target/release/build/ring-6fd1a3f6440c683b/out" "-L" "/wrkdirs/usr/ports/games/veloren/work/target/release/build/libsqlite3-sys-ef5873ae9f6e9fdc

/out" "-L" "/usr/local/lib/rustlib/x86_64-unknown-freebsd/lib" "-Wl,-Bstatic" "/tmp/rustct3DqsV/liblibloading-bd3ccf10bb8832dc.rlib" "/tmp/rustct3DqsV/liblibsqlite3_sys-bdac21fd9cc42d5d.rlib" "/tmp/rustct3DqsV/libring-ac8e5a59fbebebea.rlib" "-Wl,--start-group" "/tmp/rustct3DqsV/libbacktrace_sys-8ab9e9c1d9bb3e04.rlib" "-Wl,--end-group" "/usr/local/lib/rustlib/x86_64-unknown-freebsd/lib/libcompiler_builtins-7eb94795a99379bb.rlib" "-Wl,-Bdynamic" "-lgtk-3" "-lgdk-3" "-lpangocairo-1.0" "-lpango-1.0" "-latk-1.0" "-lcairo-gobject" "-lcairo" "-lpthread" "-lgdk_pixbuf-2.0" "-lgio-2.0" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-latk-1.0" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-lgdk-3" "-lpangocairo-1.0" "-lpango-1.0" "-lgdk_pixbuf-2.0" "-lcairo-gobject" "-lcairo" "-lpthread" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-lcairo" "-lpthread" "-lpango-1.0" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-lgdk_pixbuf-2.0" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-lgio-2.0" "-lgobject-2.0" "-lglib-2.0" "-lintl" "-lg
object-2.0" "-lglib-2.0" "-lintl" "-lglib-2.!
0" "-lintl" "-lc" "-lc" "-lasound" "-lxcb" "-lxcb" "-lxcb" "-lxcb" "-lxcb-render" "-lxcb-shape" "-lxcb-xfixes" "-lc" "-lutil" "-lutil" "-lexecinfo" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil" "-fstack-protector-strong"

= note: /wrkdirs/usr/ports/games/veloren/work/target/release/deps/veloren_voxygen-843c89249209bb67.veloren_voxygen.76os4767-cgu.6.rcgu.o: file not recognized: File format not recognized
        cc: error: linker command failed with exit code 1 (use -v to see invocation)

error: aborting due to previous error
error: could not compile veloren-voxygen.

Reported by: pkg-fallout