Linux/lsb_release: parse version string (stanislav-tkach#318)

When the lsb_release executable is not found the version is taken from
/etc/os_release and properly parsed.  When it is found, however, the
string was essentially not parsed, resulting in only Version::Custom
objects to be returned.  Calling the proper parsing function does the
trick, and Version::Semantic objects get created as expected.

The nearly manual handling of "rolling" for lsb_release, however,
looks very suspicous, it should likely be folded to
Version::from_string() instead.

Signed-off-by: Yann Dirson <[email protected]>

os_info/src/linux/lsb_release.rs

@@ -11,7 +11,7 @@ pub fn get() -> Option<Info> {
 
     let version = match release.version.as_deref() {
         Some("rolling") => Version::Rolling(None),
-        Some(v) => Version::Custom(v.to_owned()),
+        Some(v) => Version::from_string(v.to_owned()),
         None => Version::Unknown,
     };