ci: Add rtems to basic tier 3 checks

(backport <#4917>)
(cherry picked from commit b4995f3)

Author: thesummer

ci/verify-build.py

@@ -155,6 +155,7 @@ class TargetResult:
     Target("aarch64-unknown-openbsd", dist=False),
     Target("aarch64-wrs-vxworks", dist=False),
     Target("armebv7r-none-eabihf", dist=False),
+    Target("armv7-rtems-eabihf", dist=False),
     Target("armv7-wrs-vxworks-eabihf", dist=False),
     Target("armv7r-none-eabihf", dist=False),
     Target("armv7s-apple-ios", dist=False),

src/new/mod.rs

@@ -110,7 +110,7 @@ cfg_if! {
         // pub(crate) use redox::*;
     } else if #[cfg(target_os = "rtems")] {
         mod rtems;
-        pub(crate) use rtems::*;
+        // pub(crate) use rtems::*;
     } else if #[cfg(target_os = "solaris")] {
         mod solaris;
         pub(crate) use solaris::*;