sysfs: Fix basename() build with musl

[krzk]

musl provides only standard basename() which accepts non-const string. This fixes build error with musl C library:

| sysfs.cc: In function 'std::__cxx11::string sysfs_getbustype(const string&)':
| sysfs.cc:102:21: error: 'basename' was not declared in this scope
|        "/devices/" + basename(path.c_str());
|                      ^~~~~~~~

Signed-off-by: Krzysztof Kozlowski [email protected]

[BKPepe]

@lyonel Can you take a look, please?

[benkohler]

Fixed in d3c66a6b2a0799d6982f4dc77b291934fcba80c9?