const-block: Add testcase

gcc/testsuite/ChangeLog:

	* rust/execute/torture/const_block1.rs: New test.

gcc/testsuite/rust/execute/torture/const_block1.rs

diff --git a/gcc/testsuite/rust/execute/torture/const_block1.rs b/gcc/testsuite/rust/execute/torture/const_block1.rs
new file mode 100644
index 0000000..eaf3432
--- /dev/null
+++ b/gcc/testsuite/rust/execute/torture/const_block1.rs
@@ -0,0 +1,9 @@
+const X: i32 = const {
+    let a = 15;
+    let b = 14;
+    a + b
+};
+
+fn main() -> i32 {
+    X - 29
+}