Better group RFC ui tests together

tests/ui/rfcs/rfc-2632-const-trait-impl/call-generic-method-nonconst.rs

@@ -0,0 +1,26 @@
+#![feature(const_trait_impl)]
+
+struct S;
+
+#[const_trait]
+trait Foo {
+    fn eq(&self, _: &Self) -> bool;
+}
+
+impl Foo for S {
+    fn eq(&self, _: &S) -> bool {
+        true
+    }
+}
+
+const fn equals_self<T: ~const Foo>(t: &T) -> bool {
+    true
+}
+
+// Calling `equals_self` with something that has a non-const impl should throw an error, despite
+// it not using the impl.
+
+pub const EQ: bool = equals_self(&S);
+//~^ ERROR
+
+fn main() {}