Add a lld test for a llvm fix.

This is tested in llvm, but it seems reasonable to have a small
integration test in lld.

llvm-svn: 322815

lld/test/ELF/lto/setting-dso-local.ll

@@ -0,0 +1,15 @@
+; REQUIRES: x86
+; RUN: llvm-as %s -o %t1.o
+; RUN: not ld.lld -o %t %t1.o 2>&1 | FileCheck %s
+
+; CHECK: undefined symbol: foobar
+
+; We used to crash setting foobar to non-dso_local
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@foobar = external hidden global i32
+define i32* @_start() {
+  ret i32* @foobar
+}