Need a test to verify that Cargo.toml descriptions match lint descriptions

[smoelius]

E.g., that this:

dylint/examples/general/wrong_serialize_struct_arg/Cargo.toml

Line 5 in 5f47c91

description = "A lint to check for calls to serialization methods with incorrect `len` arguments"

matches this:

dylint/examples/general/wrong_serialize_struct_arg/src/lib.rs

Line 95 in 5f47c91

"calls to serialization methods with incorrect `len` arguments",

A test like this would have the problem that #1650 fixed.

The test should go in this file: https://github.com/trailofbits/dylint/blob/master/examples/src/lib.rs