Fully build SFML binaries for Linux

[Gnimuc]

Currently, users still need to manually install dependencies on Linux. The ultimate solution would be building everything via BB2, here is a list:

• pthread (integrated in glibc)
• OggBuilder https://github.com/staticfloat/OggBuilder
• FLACBuilder https://github.com/staticfloat/FLACBuilder
• FreeTypeBuilder https://github.com/JuliaGraphics/FreeTypeBuilder
• vorbis https://github.com/JuliaIO/LibVorbisBuilder
• xrandr source: https://github.com/freedesktop/xorg-libXrandr
• openal source:?? https://github.com/kcat/openal-soft
• Xlib source: https://github.com/mirror/libX11

[Gnimuc]

Update

• pthread (integrated in glibc)
• Ogg https://github.com/JuliaBinaryWrappers/Ogg_jll.jl
• FLAC https://github.com/JuliaBinaryWrappers/FLAC_jll.jl
• FreeType https://github.com/JuliaBinaryWrappers/FreeType2_jll.jl
• vorbis https://github.com/JuliaBinaryWrappers/libvorbis_jll.jl
• xrandr https://github.com/JuliaBinaryWrappers/Xorg_libXrandr_jll.jl
• openal source:?? https://github.com/kcat/openal-soft
• Xlib https://github.com/JuliaBinaryWrappers/Xorg_libX11_jll.jl