Add rust 1.12 through 1.14. In a separate change, nightly and beta have been updated too. Addresses #208
Add rust 1.12 through 1.14. In a separate change, nightly and beta have been updated too. Addresses #208

mattgodbolt/gcc-explorer,dkm/gcc-explorer,mattgodbolt/compiler-explorer,mattgodbolt/gcc-explorer,dkm/gcc-explorer,ibuclaw/gcc-explorer,mattgodbolt/compiler-explorer,ibuclaw/gcc-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,dkm/gcc-explorer,dkm/gcc-explorer,dkm/gcc-explorer,mattgodbolt/gcc-explorer,ibuclaw/gcc-explorer,dkm/gcc-explorer,ibuclaw/gcc-explorer,ibuclaw/gcc-explorer,mattgodbolt/compiler-explorer,mattgodbolt/gcc-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,dkm/gcc-explorer,dkm/gcc-explorer,mattgodbolt/gcc-explorer,dkm/gcc-explorer