With the new test framework, GitHub really wants to mark littlefs as a
python project. telling it to reclassify our test .toml files as C code
(which they are 95% of anyways) remedies this.
An alternative would be to add syntax=c vim modelines to the test/bench
files, which would also render them with C syntax highlighting on
GitHub. Unfortunately the interspersed toml metadata mucks this up,
making the result not very useful.
