Auto merge of #5572 - kngwyu:for-racer, r=alexcrichton

Make add_overrides and get_resolved_packages pub

For racer-rust/racer#855.
Now  we're planning to use cargo to resolve dependencies, but for RLS we can't write `Cargo.lock`.
So we have to call `resolve_with_previous` directly, and want to use these functions.

Author: bors

src/cargo/ops/resolve.rs

@@ -335,7 +335,7 @@ pub fn resolve_with_previous<'a, 'cfg>(
 
 /// Read the `paths` configuration variable to discover all path overrides that
 /// have been configured.
-fn add_overrides<'a>(registry: &mut PackageRegistry<'a>, ws: &Workspace<'a>) -> CargoResult<()> {
+pub fn add_overrides<'a>(registry: &mut PackageRegistry<'a>, ws: &Workspace<'a>) -> CargoResult<()> {
     let paths = match ws.config().get_list("paths")? {
         Some(list) => list,
         None => return Ok(()),
@@ -364,7 +364,7 @@ fn add_overrides<'a>(registry: &mut PackageRegistry<'a>, ws: &Workspace<'a>) ->
     Ok(())
 }
 
-fn get_resolved_packages<'a>(resolve: &Resolve, registry: PackageRegistry<'a>) -> PackageSet<'a> {
+pub fn get_resolved_packages<'a>(resolve: &Resolve, registry: PackageRegistry<'a>) -> PackageSet<'a> {
     let ids: Vec<PackageId> = resolve.iter().cloned().collect();
     registry.get(&ids)
 }