add skipBytes function to InStream
add skipBytes function to InStream

this reads N bytes, discarding their values

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