Don't enforce that a type can only be passed as a comptime parameter

[daurnimator]

fn show(anything: var) void {
    switch (@typeInfo(@typeOf(anything))) {
        .Bool, .Int => std.debug.warn("{}={}", @typeName(@typeOf(anything)), anything),
        .Type => std.debug.warn("{}={}", @typeName(@typeOf(anything)), @typeName(anything)),
        .else => unreachable,
    }
}

fails when passing a type in:

error: parameter of type 'type' requires comptime

I don't want to make the parameter comptime, as other branches use the runtime value.

[andrewrk]

This is accepted, and it is a duplicate of #1383.