Add empty test binary for riscv

tests/riscv32/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+edition = "2021"
+name = "embassy-riscv-tests"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+critical-section = { version = "1.1.1", features = ["restore-state-bool"] }
+embassy-sync = { version = "0.1.0", path = "../../embassy-sync" }
+embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features = ["arch-riscv32", "nightly", "executor-thread"] }
+embassy-time = { version = "0.1.0", path = "../../embassy-time" }
+embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
+
+riscv-rt = "0.11"
+riscv = { version = "0.10", features = ["critical-section-single-hart"] }
+
+
+[profile.dev]
+debug = 2
+debug-assertions = true
+opt-level = 's'
+overflow-checks = true
+
+[profile.release]
+codegen-units = 1
+debug = 2
+debug-assertions = false
+incremental = false
+lto = "fat"
+opt-level = 's'
+overflow-checks = false
+
+# do not optimize proc-macro crates = faster builds from scratch
+[profile.dev.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
+
+[profile.release.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false