Prevent stub inclusion when building shared objects (bp #10875) (#10879)

* Prevent stub inclusion when building shared objects (#10875)

(cherry picked from commit 52526a9bc2)

# Conflicts:
#	programs/bpf/rust/128bit/src/lib.rs
#	programs/bpf/rust/alloc/src/lib.rs
#	programs/bpf/rust/dep_crate/src/lib.rs
#	programs/bpf/rust/invoke/src/lib.rs
#	programs/bpf/rust/invoked/src/lib.rs
#	programs/bpf/rust/iter/src/lib.rs
#	programs/bpf/rust/many_args/src/lib.rs
#	programs/bpf/rust/many_args_dep/src/lib.rs
#	programs/bpf/rust/noop/src/lib.rs
#	programs/bpf/rust/param_passing/src/lib.rs
#	programs/bpf/rust/param_passing_dep/src/lib.rs
#	sdk/bpf/rust/test/src/lib.rs

* nudge

Co-authored-by: Jack May <jack@solana.com>

sdk/bpf/rust/test/Cargo.toml

@@ -1,15 +0,0 @@
-[package]
-name = "solana-sdk-bpf-test"
-version = "1.2.9"
-description = "Solana BPF SDK test utilities"
-authors = ["Solana Maintainers <maintainers@solana.com>"]
-repository = "https://github.com/solana-labs/solana"
-license = "Apache-2.0"
-homepage = "https://solana.com/"
-edition = "2018"
-
-[workspace]
-members = []
-
-[package.metadata.docs.rs]
-targets = ["x86_64-unknown-linux-gnu"]