Add test case for foreign Rust exceptions

src/test/run-make-fulldeps/foreign-rust-exceptions/Makefile

@@ -0,0 +1,6 @@
+include ../tools.mk
+
+all:
+	$(RUSTC) bar.rs --crate-type=cdylib
+	$(RUSTC) foo.rs
+	$(call RUN,foo) 2>&1 | $(CGREP) "Rust cannot catch foreign exceptions"

src/test/run-make-fulldeps/foreign-rust-exceptions/bar.rs

@@ -0,0 +1,7 @@
+#![crate_type = "cdylib"]
+#![feature(c_unwind)]
+
+#[no_mangle]
+extern "C-unwind" fn panic() {
+    panic!();
+}

src/test/run-make-fulldeps/foreign-rust-exceptions/foo.rs

@@ -0,0 +1,12 @@
+#![feature(c_unwind)]
+
+#[link(name = "bar")]
+extern "C-unwind" {
+    fn panic();
+}
+
+fn main() {
+    let _ = std::panic::catch_unwind(|| {
+        unsafe { panic() };
+    });
+}