gccrs: Fix regression in testcase

Fixes #776

Signed-off-by: Philip Herron <herron.philip@googlemail.com>

gcc/testsuite/ChangeLog:

	* rust/compile/torture/traits10.rs: Fix test-case

gcc/testsuite/rust/compile/torture/traits10.rs

-trait Foo // where
-//     Self: Sized,
+#[lang = "sized"]
+pub trait Sized {}
+
+#[lang = "clone"]
+pub trait Clone: Sized {
+    fn clone(&self) -> Self;
+
+    fn clone_from(&mut self, source: &Self) {
+        *self = source.clone()
+    }
+}
+
+mod impls {
+    use super::Clone;
+
+    macro_rules! impl_clone {
+        ($($t:ty)*) => {
+            $(
+                impl Clone for $t {
+                    fn clone(&self) -> Self {
+                        *self
+                    }
+                }
+            )*
+        }
+    }
+
+    impl_clone! {
+        usize u8 u16 u32 u64 // u128
+        isize i8 i16 i32 i64 // i128
+        f32 f64
+        bool char
+    }
+}
+
+#[lang = "copy"]
+pub trait Copy: Clone {
+    // Empty.
+}
+
+mod copy_impls {
+    use super::Copy;
+
+    macro_rules! impl_copy {
+        ($($t:ty)*) => {
+            $(
+                impl Copy for $t {}
+            )*
+        }
+    }
+
+    impl_copy! {
+        usize u8 u16 u32 u64 // u128
+        isize i8 i16 i32 i64 // i128
+        f32 f64
+        bool char
+    }
+}
+
+trait Foo
+where
+    Self: Sized,
 {
     fn get(self) -> i32;