move const-generic issues into seperate directory

src/test/ui/const-generics/issues/issue-68104-print-stack-overflow.rs

@@ -0,0 +1,15 @@
+// aux-build:impl-const.rs
+// run-pass
+// revisions: full min
+
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+
+extern crate impl_const;
+
+use impl_const::*;
+
+pub fn main() {
+    let n = Num::<5>;
+    n.five();
+}