docs: update deps to llvm and clang 3.7.1
docs: update deps to llvm and clang 3.7.1

Dimenus/zig,andrewrk/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,Dimenus/zig,raulgrell/zig,Dimenus/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig