rust: add rust.workspace() skeleton implementation

rust.workspace() is the entry point for global feature resolution.
It loads a Cargo.toml file and ensures that all dependencies will be
built with the correct set of features.

Fixes: #13404
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/test cases/rust/31 rust.workspace package/src/main.rs b/test cases/rust/31 rust.workspace package/src/main.rs
new file mode 100644
index 000000000..39b324801
--- /dev/null
+++ b/test cases/rust/31 rust.workspace package/src/main.rs
@@ -0,0 +1,6 @@
+use hello::greet;
+
+fn main() {
+    println!("{}", greet());
+    println!("{}", answer::answer());
+}