Move musl tests to test-framework crate

Signed-off-by: Benjamin Schultzer <benjamin@schultzer.com>

Author: Schultzer

Cargo.toml

@@ -15,17 +15,14 @@ edition = "2018"
 default = ['stable']
 stable = []
 
-# Generate tests which are random inputs and the outputs are calculated with
-# musl libc.
-musl-reference-tests = ['rand']
-
 # Used checked array indexing instead of unchecked array indexing in this
 # library.
 checked = []
 
 [workspace]
 members = [
   "crates/compiler-builtins-smoke-test",
+  "crates/libm-test"
 ]
 
 [dev-dependencies]
@@ -35,3 +32,4 @@ paste = "0.1.5"
 
 [build-dependencies]
 rand = { version = "0.6.5", optional = true }
+libm-test = { version = "0.*", path = "./crates/libm-test" }