Update supported platforms.
Update supported platforms.

dneto0/shaderc,drewet/shaderc,antiagainst/shaderc,dneto0/shaderc,fuchsia-mirror/third_party-shaderc,AWoloszyn/shaderc,dneto0/shaderc,dneto0/shaderc,Qining/shaderc,AWoloszyn/shaderc,antiagainst/shaderc,Qining/shaderc,antiagainst/shaderc,AWoloszyn/shaderc,fuchsia-mirror/third_party-shaderc,drewet/shaderc,drewet/shaderc,antiagainst/shaderc,Qining/shaderc,fuchsia-mirror/third_party-shaderc