Test RDRAND on x86/x86_64

Signed-off-by: Joe Richey <joerichey@google.com>

Author: josephlr

src/lib.rs

@@ -411,3 +411,6 @@ pub fn getrandom_uninit(dest: &mut [MaybeUninit<u8>]) -> Result<&mut [u8], Error
     not(all(target_family = "wasm", target_os = "unknown", feature = "custom"))
 ))]
 pub(crate) mod tests;
+// TODO: Remove this hack when rdrand is part of the public API
+#[cfg(all(test, any(target_arch = "x86_64", target_arch = "x86")))]
+mod rdrand;

src/rdrand.rs

@@ -121,3 +121,8 @@ unsafe fn rdrand_exact(dest: &mut [MaybeUninit<u8>]) -> Option<()> {
     }
     Some(())
 }
+
+#[cfg(test)]
+mod tests {
+    crate::tests::define_tests!(super::getrandom_inner);
+}