milestone: POSIX/relibc harness + USB checker restored

test-posix-runtime.sh: unified POSIX runtime harness running all 6
relibc-phase1-tests C programs in guest/QEMU modes, exit-code-based

redbear-usb-check.rs: recreated after cancelled task cleanup —
full Phase-pattern checker with JSON output, xHCI/USB/HID/storage probes

Zero warnings, all scripts syntax-clean.

local/recipes/system/redbear-hwutils/source/src/bin/redbear-usb-check.rs

@@ -40,7 +40,6 @@ impl Report {
     fn new(json_mode: bool) -> Self { Report { checks: Vec::new(), json_mode } }
     fn add(&mut self, check: Check) { self.checks.push(check); }
     fn any_failed(&self) -> bool { self.checks.iter().any(|c| c.result == CheckResult::Fail) }
-
     fn print(&self) {
         if self.json_mode { self.print_json(); } else { self.print_human(); }
     }