Add `SETUP_INSTALL_RPATH` to `iree-run-mlir`. (#13366)

Untested, but we believe this will fix 
```
./bin/iree-run-mlir: error while loading shared libraries: libIREECompiler.so.0: cannot open shared object file: No such file or directory
```

Context:
https://github.com/openxla/iree/pull/12715#pullrequestreview-1409628587
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 3814889..45eb0ee 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -309,6 +309,7 @@
     DATA
       ${IREE_LLD_TARGET}
     HOSTONLY
+    SETUP_INSTALL_RPATH
   )
 
   # Ensure FileCheck and associated binaries get built. Tests don't have